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<H1 align=center style='text-align:center'><span lang=EN-GB style='color:red;
mso-ansi-language:EN-GB'>- K B I - K</span><span lang=EN-GB style='mso-ansi-language:
EN-GB'>now <span style='color:red'>B</span>est <span style='color:red'>I</span>nference<o:p></o:p></span></H1>

<H2 align=center style='text-align:center'><span lang=EN-GB style='mso-ansi-language:
EN-GB'>NUMERI TETRAEDRICI (Tetrahedral - or triangular pyramidal - numbers)</span><span lang=EN-US
style='mso-ansi-language:EN-US'><o:p></o:p></span></H2>

<h1 align=center style='text-align:center'><span lang=EN-US style='mso-ansi-language:
EN-US'>Tavola numerica controllata</span><span lang=EN-GB style='mso-ansi-language:EN-GB'>
<o:p></o:p></span></h1>

<p class=MsoNormal style='margin-top:0cm;margin-right:0cm;margin-bottom:12.0pt;
margin-left:10.0pt'>Contatti email: </p>

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     href="mailto:matrix@kbi.it">matrix@kbi.it</a><span style="mso-spacerun:
     yes">  </span>(<b>Statistical applications</b>)</li>

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     style='mso-ansi-language:EN-GB'><a href="mailto:rebus@kbi.it"><span
     lang=IT style='mso-ansi-language:IT'>rebus@kbi.it</span></a></span> (<b>Mathematical
     applications</b>)</li>


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margin-left:1.0cm'>

<h2><span style='color:navy'>Dott. p.i. Kofler Massimo<o:p></o:p></span></h2>

<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='color:navy'>Socio ordinario S.I.S. – Società Italiana di Statistica<o:p></o:p></span></b></p>

<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
style='color:navy'>Socio ordinario U.M.I. – Unione Matematica Italiana <o:p></o:p></span></b></p>

<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='color:green'><o:p></o:p></span></p>

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<H3 align=center style='text-align:center'><span lang=EN-US style='mso-ansi-language:
EN-US'>Tavola di numeri tetraedrici (i primi 100)</span><span lang=EN-GB style='mso-ansi-language:EN-GB'>
<o:p></o:p></span></H3>

<H4 align=center style='text-align:center'><span lang=EN-US style='mso-ansi-language:
EN-US'>Un numero tetraedrico, (o piramidale triangolare), è un numero figurato che rappresenta una 
piramide di base triangolare (un tetraedro). </span><span lang=EN-GB style='mso-ansi-language:EN-GB'>
<o:p></o:p></span></H4>

<H4 align=center style='text-align:center'><span lang=EN-US style='mso-ansi-language:
EN-US'>La serie si calcola con la formula: a(n) = n*(n+1)*(n+2)/6.</span><span lang=EN-GB style='mso-ansi-language:EN-GB'>
<o:p></o:p></span></H4>

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margin-left:1.0cm'><span style='color:navy'>

Ordine		Tetraedrico	<br>	
1°	→	1	<br>
2°	→	4	<br>
3°	→	10	<br>
4°	→	20	<br>
5°	→	35	<br>
6°	→	56	<br>
7°	→	84	<br>
8°	→	120	<br>
9°	→	165	<br>
10°	→	220	<br>
11°	→	286	<br>
12°	→	364	<br>
13°	→	455	<br>
14°	→	560	<br>
15°	→	680	<br>
16°	→	816	<br>
17°	→	969	<br>
18°	→	1140	<br>
19°	→	1330	<br>
20°	→	1540	<br>
21°	→	1771	<br>
22°	→	2024	<br>
23°	→	2300	<br>
24°	→	2600	<br>
25°	→	2925	<br>
26°	→	3276	<br>
27°	→	3654	<br>
28°	→	4060	<br>
29°	→	4495	<br>
30°	→	4960	<br>
31°	→	5456	<br>
32°	→	5984	<br>
33°	→	6545	<br>
34°	→	7140	<br>
35°	→	7770	<br>
36°	→	8436	<br>
37°	→	9139	<br>
38°	→	9880	<br>
39°	→	10660	<br>
40°	→	11480	<br>
41°	→	12341	<br>
42°	→	13244	<br>
43°	→	14190	<br>
44°	→	15180	<br>
45°	→	16215	<br>
46°	→	17296	<br>
47°	→	18424	<br>
48°	→	19600	<br>
49°	→	20825	<br>
50°	→	22100	<br>
51°	→	23426	<br>
52°	→	24804	<br>
53°	→	26235	<br>
54°	→	27720	<br>
55°	→	29260	<br>
56°	→	30856	<br>
57°	→	32509	<br>
58°	→	34220	<br>
59°	→	35990	<br>
60°	→	37820	<br>
61°	→	39711	<br>
62°	→	41664	<br>
63°	→	43680	<br>
64°	→	45760	<br>
65°	→	47905	<br>
66°	→	50116	<br>
67°	→	52394	<br>
68°	→	54740	<br>
69°	→	57155	<br>
70°	→	59640	<br>
71°	→	62196	<br>
72°	→	64824	<br>
73°	→	67525	<br>
74°	→	70300	<br>
75°	→	73150	<br>
76°	→	76076	<br>
77°	→	79079	<br>
78°	→	82160	<br>
79°	→	85320	<br>
80°	→	88560	<br>
81°	→	91881	<br>
82°	→	95284	<br>
83°	→	98770	<br>
84°	→	102340	<br>
85°	→	102340	<br>
86°	→	102340	<br>
87°	→	102340	<br>
88°	→	102340	<br>
89°	→	102340	<br>
90°	→	102340	<br>
91°	→	102340	<br>
92°	→	102340	<br>
93°	→	102340	<br>
94°	→	102340	<br>
95°	→	102340	<br>
96°	→	102340	<br>
97°	→	102340	<br>
98°	→	102340	<br>
99°	→	102340	<br>
100°	→	102340	<br>
			
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