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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.

A099694 Consider the family of directed multigraphs enriched by the species of directed sets. Sequence gives number of those multigraphs with n labeled loops and arcs.

Table of values

n a(n)
0 1
1 2
2 17
3 244
4 5283
5 156092
6 5954547
7 282221828
8 16159327961
9 1094056231572
10 86116276633357
11 7773114989571400
12 795480206815177651
13 91417037615848058160
14 11701283925663217478843
15 1656436690705751478232180
16 257730676653629520748175377
17 43837005194184348815823808500

List of values

[1, 2, 17, 244, 5283, 156092, 5954547, 282221828, 16159327961, 1094056231572, 86116276633357, 7773114989571400, 795480206815177651, 91417037615848058160, 11701283925663217478843, 1656436690705751478232180, 257730676653629520748175377, 43837005194184348815823808500]

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

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