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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.

A053517 Number of connected directed 2-multigraphs on n nodes.

Table of values

n a(n)
1 1
2 5
3 132
4 22662
5 29174514
6 286151774704
7 21712410740238954
8 12980058344488389640470
9 62082372574276838787463958455
10 2405193558246444686967534052419452898
11 762399004073792344564641131264446658930745417

List of values

[1, 5, 132, 22662, 29174514, 286151774704, 21712410740238954, 12980058344488389640470, 62082372574276838787463958455, 2405193558246444686967534052419452898, 762399004073792344564641131264446658930745417]

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

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