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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.

A020554 Number of multigraphs on n labeled edges (without loops).

Table of values

n a(n)
0 1
1 1
2 3
3 16
4 139
5 1750
6 29388
7 624889
8 16255738
9 504717929
10 18353177160
11 769917601384
12 36803030137203
13 1984024379014193
14 119571835094300406
15 7995677265437541258
16 589356399302126773920
17 47609742627231823142029
18 4193665147256300117666879

List of values

[1, 1, 3, 16, 139, 1750, 29388, 624889, 16255738, 504717929, 18353177160, 769917601384, 36803030137203, 1984024379014193, 119571835094300406, 7995677265437541258, 589356399302126773920, 47609742627231823142029, 4193665147256300117666879]

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

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