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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.

A165950 Number of acyclic digraphs on n labeled nodes with one source and one sink.

Table of values

n a(n)
1 1
2 2
3 12
4 216
5 10600
6 1306620
7 384471444
8 261548825328
9 402632012394000
10 1381332938730123060
11 10440873023366019273820
12 172308823347127690038311496
13 6163501139185639837183141411320
14 474942255590583211554917995123517868
15 78430816994991932467786587093292327531620

List of values

[1, 2, 12, 216, 10600, 1306620, 384471444, 261548825328, 402632012394000, 1381332938730123060, 10440873023366019273820, 172308823347127690038311496, 6163501139185639837183141411320, 474942255590583211554917995123517868, 78430816994991932467786587093292327531620]

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

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