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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.

A308667 (1/n) times the number of n-member subsets of [n^2] whose elements sum to a multiple of n.

Table of values

n a(n)
1 1
2 1
3 10
4 115
5 2126
6 54086
7 1753074
8 69159399
9 3220837534
10 173103073384
11 10551652603526
12 719578430425845
13 54297978110913252
14 4492502634538340722
15 404469190271900056316
16 39370123445405248353743
17 4120204305690280446004838
18 461365717080848755611811094

List of values

[1, 1, 10, 115, 2126, 54086, 1753074, 69159399, 3220837534, 173103073384, 10551652603526, 719578430425845, 54297978110913252, 4492502634538340722, 404469190271900056316, 39370123445405248353743, 4120204305690280446004838, 461365717080848755611811094]

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

Content is available under The OEIS End-User License Agreement.