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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.

A102760 Number of partitions of n-set into "lists", in which every even list appears an even number of times, cf. A000262.

Table of values

n a(n)
0 1
1 1
2 1
3 7
4 37
5 241
6 1381
7 13231
8 140617
9 1483777
10 16211881
11 217551511
12 3384215341
13 50221272817
14 782154787597
15 13913712591871
16 272739557719441
17 5282625708305281
18 106588332600443857
19 2354480141600267047
20 56238135934525073461
21 1338131691952924913521

List of values

[1, 1, 1, 7, 37, 241, 1381, 13231, 140617, 1483777, 16211881, 217551511, 3384215341, 50221272817, 782154787597, 13913712591871, 272739557719441, 5282625708305281, 106588332600443857, 2354480141600267047, 56238135934525073461, 1338131691952924913521]

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

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