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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.

A333715 a(n) = [x^(3*n)] ( (1 + x)/(1 - x) )^n.

Table of values

n a(n)
0 1
1 2
2 24
3 326
4 4672
5 69002
6 1038984
7 15856206
8 244396544
9 3795731282
10 59307908024
11 931222155030
12 14680871849152
13 232236016459098
14 3684420837693480
15 58600075142247326
16 934064636705476608
17 14917333936933664674
18 238641621366613695576
19 3823510794994321546214
20 61344017874989324388672

List of values

[1, 2, 24, 326, 4672, 69002, 1038984, 15856206, 244396544, 3795731282, 59307908024, 931222155030, 14680871849152, 232236016459098, 3684420837693480, 58600075142247326, 934064636705476608, 14917333936933664674, 238641621366613695576, 3823510794994321546214, 61344017874989324388672]

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

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