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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.

A266518 Number of ordered partitions of a 2n-set with nondecreasing block sizes and maximal block size equal to n.

Table of values

n a(n)
0 1
1 2
2 18
3 200
4 3290
5 61992
6 1480248
7 39402792
8 1229123610
9 42349478600
10 1640551617848
11 69364811821032
12 3222214209737432
13 161656803984848200
14 8772238289222220600
15 509677254444910662000
16 31677425399312755814970
17 2092539622373193784503240

List of values

[1, 2, 18, 200, 3290, 61992, 1480248, 39402792, 1229123610, 42349478600, 1640551617848, 69364811821032, 3222214209737432, 161656803984848200, 8772238289222220600, 509677254444910662000, 31677425399312755814970, 2092539622373193784503240]

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

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