cp's OEIS Frontend

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.

A318432 Number of n-element subsets of [4n] whose elements sum to a multiple of n.

Table of values

n a(n)
0 1
1 4
2 12
3 76
4 460
5 3104
6 22404
7 169152
8 1315020
9 10460416
10 84764512
11 697212652
12 5805722692
13 48847196896
14 414623627136
15 3546272614976
16 30532934225100
17 264420681260336
18 2301782759539392
19 20129523771781288
20 176765807152990560
21 1558058796052048968

List of values

[1, 4, 12, 76, 460, 3104, 22404, 169152, 1315020, 10460416, 84764512, 697212652, 5805722692, 48847196896, 414623627136, 3546272614976, 30532934225100, 264420681260336, 2301782759539392, 20129523771781288, 176765807152990560, 1558058796052048968]

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

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