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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.

A003087 Number of acyclic digraphs with n unlabeled nodes.

Table of values

n a(n)
0 1
1 1
2 2
3 6
4 31
5 302
6 5984
7 243668
8 20286025
9 3424938010
10 1165948612902
11 797561675349580
12 1094026876269892596
13 3005847365735456265830
14 16530851611091131512031070
15 181908117707763484218885361402

List of values

[1, 1, 2, 6, 31, 302, 5984, 243668, 20286025, 3424938010, 1165948612902, 797561675349580, 1094026876269892596, 3005847365735456265830, 16530851611091131512031070, 181908117707763484218885361402]

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

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