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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.

A318433 Number of n-element subsets of [5n] whose elements sum to a multiple of n.

Table of values

n a(n)
0 1
1 5
2 20
3 155
4 1220
5 10630
6 98900
7 960650
8 9613700
9 98462675
10 1027222520
11 10877596900
12 116613287300
13 1263159501180
14 13803839298920
15 152000845788280
16 1684888825463940
17 18785707522181965
18 210536007879090140
19 2370423142929112065
20 26799168520704093720

List of values

[1, 5, 20, 155, 1220, 10630, 98900, 960650, 9613700, 98462675, 1027222520, 10877596900, 116613287300, 1263159501180, 13803839298920, 152000845788280, 1684888825463940, 18785707522181965, 210536007879090140, 2370423142929112065, 26799168520704093720]

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

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