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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.

A182161 Number of extensional acyclic digraphs on n labeled nodes.

Table of values

n a(n)
0 1
1 1
2 2
3 12
4 216
5 10560
6 1297440
7 381013920
8 258918871680
9 398362519618560
10 1366301392119014400
11 10325798296570753920000
12 170397664079650720884864000
13 6094923358716319193283074457600
14 469649545161250827117772066578739200
15 77556106803568453086056722450983544320000

List of values

[1, 1, 2, 12, 216, 10560, 1297440, 381013920, 258918871680, 398362519618560, 1366301392119014400, 10325798296570753920000, 170397664079650720884864000, 6094923358716319193283074457600, 469649545161250827117772066578739200, 77556106803568453086056722450983544320000]

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

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