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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.

A334250 Number of set partitions of [3n] into 3-element subsets {i, i+k, i+2k} with 1<=k<=n.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 12
5 35
6 129
7 567
8 2920
9 16110
10 103467
11 717608
12 5748214
13 47937957
14 441139750
15 4319093093
16 45963368076
17 510202534002
18 6150655137844
19 76789781005325
20 1028853084775725
21 14294680087131380

List of values

[1, 1, 2, 4, 12, 35, 129, 567, 2920, 16110, 103467, 717608, 5748214, 47937957, 441139750, 4319093093, 45963368076, 510202534002, 6150655137844, 76789781005325, 1028853084775725, 14294680087131380]

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

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