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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.

A001296 4-dimensional pyramidal numbers: a(n) = (3*n+1)*binomial(n+2, 3)/4. Also Stirling2(n+2, n).

Table of values

n a(n)
0 0
1 1
2 7
3 25
4 65
5 140
6 266
7 462
8 750
9 1155
10 1705
11 2431
12 3367
13 4550
14 6020
15 7820
16 9996
17 12597
18 15675
19 19285
20 23485
21 28336
22 33902
23 40250
24 47450
25 55575
26 64701
27 74907
28 86275
29 98890
30 112840
31 128216
32 145112
33 163625
34 183855
35 205905
36 229881
37 255892
38 284050
39 314470

List of values

[0, 1, 7, 25, 65, 140, 266, 462, 750, 1155, 1705, 2431, 3367, 4550, 6020, 7820, 9996, 12597, 15675, 19285, 23485, 28336, 33902, 40250, 47450, 55575, 64701, 74907, 86275, 98890, 112840, 128216, 145112, 163625, 183855, 205905, 229881, 255892, 284050, 314470]

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

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