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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.

A339836 Number of bicolored graphs on n unlabeled nodes such that every white node is adjacent to a black node.

Table of values

n a(n)
0 1
1 1
2 3
3 10
4 47
5 296
6 2970
7 49604
8 1484277
9 81494452
10 8273126920
11 1552510549440
12 538647737513260
13 346163021846858368
14 413301431190875322768
15 920040760819708654610560
16 3832780109273882704828352620
17 29989833030101321999992097828464
18 442280129125813382230656891568680400

List of values

[1, 1, 3, 10, 47, 296, 2970, 49604, 1484277, 81494452, 8273126920, 1552510549440, 538647737513260, 346163021846858368, 413301431190875322768, 920040760819708654610560, 3832780109273882704828352620, 29989833030101321999992097828464, 442280129125813382230656891568680400]

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

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