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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.

A098631 Consider the family of directed multigraphs enriched by the species of parts. Sequence gives number of those multigraphs with n labeled arcs.

Table of values

n a(n)
0 1
1 2
2 28
3 696
4 26512
5 1402656
6 97017792
7 8418174848
8 889241719040
9 111774837350912
10 16420543334734848
11 2778708477919836160
12 535183812199464341504
13 116142946557502449852416
14 28156854547845767203373056
15 7569375509914847295271043072
16 2241898693518356603925445017600

List of values

[1, 2, 28, 696, 26512, 1402656, 97017792, 8418174848, 889241719040, 111774837350912, 16420543334734848, 2778708477919836160, 535183812199464341504, 116142946557502449852416, 28156854547845767203373056, 7569375509914847295271043072, 2241898693518356603925445017600]

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

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