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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.

A098630 Consider the family of directed multigraphs enriched by the species of parts. Sequence gives number of those multigraphs with n labeled loops and arcs.

Table of values

n a(n)
0 1
1 4
2 60
3 1624
4 66240
5 3711200
6 269670208
7 24435113216
8 2682916389632
9 349223324753408
10 52965538033020928
11 9229753832340117504
12 1826647528631522463744
13 406579171521484851396608
14 100934277604965329345822720
15 27746271707522968205726416896

List of values

[1, 4, 60, 1624, 66240, 3711200, 269670208, 24435113216, 2682916389632, 349223324753408, 52965538033020928, 9229753832340117504, 1826647528631522463744, 406579171521484851396608, 100934277604965329345822720, 27746271707522968205726416896]

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

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