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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.

A326289 a(0) = 0, a(n) = 2^binomial(n,2) - 2^(n - 1).

Table of values

n a(n)
0 0
1 0
2 0
3 4
4 56
5 1008
6 32736
7 2097088
8 268435328
9 68719476480
10 35184372088320
11 36028797018962944
12 73786976294838204416
13 302231454903657293672448
14 2475880078570760549798240256
15 40564819207303340847894502555648
16 1329227995784915872903807060280311808

List of values

[0, 0, 0, 4, 56, 1008, 32736, 2097088, 268435328, 68719476480, 35184372088320, 36028797018962944, 73786976294838204416, 302231454903657293672448, 2475880078570760549798240256, 40564819207303340847894502555648, 1329227995784915872903807060280311808]

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

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