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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.

A111637 Number of labeled graphs having n blue nodes and n green ones, where edges join only nodes of different colors.

Table of values

n a(n)
0 1
1 4
2 96
3 10240
4 4587520
5 8455716864
6 63496796504064
7 1932044240141942784
8 237409596228641929297920
9 117555946699326540948428554240
10 234206054295766751302924897412448256
11 1875359927045089548108556844295368069873664

List of values

[1, 4, 96, 10240, 4587520, 8455716864, 63496796504064, 1932044240141942784, 237409596228641929297920, 117555946699326540948428554240, 234206054295766751302924897412448256, 1875359927045089548108556844295368069873664]

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

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