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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A269747 Number of regular tetrahedra in an n-node-per-edge tetrahedral grid.

Table of values

n a(n)
0 0
1 0
2 1
3 5
4 16
5 39
6 80
7 155
8 281
9 476
10 760
11 1154
12 1686
13 2394
14 3331
15 4551
16 6110
17 8065
18 10486
19 13461
20 17079
21 21430
22 26606
23 32726
24 39928
25 48360
26 58183
27 69573
28 82708
29 97767
30 114930
31 134387
32 156329
33 180960
34 208506
35 239230
36 273444
37 311486
38 353709
39 400467
40 452136
41 509093
42 571716
43 640393
44 715537

List of values

[0, 0, 1, 5, 16, 39, 80, 155, 281, 476, 760, 1154, 1686, 2394, 3331, 4551, 6110, 8065, 10486, 13461, 17079, 21430, 26606, 32726, 39928, 48360, 58183, 69573, 82708, 97767, 114930, 134387, 156329, 180960, 208506, 239230, 273444, 311486, 353709, 400467, 452136, 509093, 571716, 640393, 715537]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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