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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.

A309182 (1/3) times the number of n-member subsets of [3n] whose elements sum to a multiple of n.

Table of values

n a(n)
1 1
2 2
3 10
4 42
5 201
6 1028
7 5538
8 30666
9 173593
10 1001402
11 5864750
12 34769364
13 208267320
14 1258574116
15 7663720710
16 46976034378
17 289628805623
18 1794932294978
19 11175157356522
20 69864075597442
21 438403736549145
22 2760351027094300
23 17433869214973754
24 110420300879752980

List of values

[1, 2, 10, 42, 201, 1028, 5538, 30666, 173593, 1001402, 5864750, 34769364, 208267320, 1258574116, 7663720710, 46976034378, 289628805623, 1794932294978, 11175157356522, 69864075597442, 438403736549145, 2760351027094300, 17433869214973754, 110420300879752980]

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

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