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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.

A309188 (1/9) times the number of n-member subsets of [9n] whose elements sum to a multiple of n.

Table of values

n a(n)
1 1
2 8
3 109
4 1640
5 27151
6 478232
7 8782075
8 166237160
9 3220837534
10 63562714008
11 1273237637706
12 25820645555000
13 529080420540114
14 10937268134114568
15 227824992158991334
16 4777204094770874856
17 100757627271124231383
18 2136117417345649876112
19 45496022230420668679932

List of values

[1, 8, 109, 1640, 27151, 478232, 8782075, 166237160, 3220837534, 63562714008, 1273237637706, 25820645555000, 529080420540114, 10937268134114568, 227824992158991334, 4777204094770874856, 100757627271124231383, 2136117417345649876112, 45496022230420668679932]

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

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