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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.

A052171 Number of directed multigraphs with loops on an infinite set of nodes containing a total of n arcs.

Table of values

n a(n)
0 1
1 2
2 11
3 52
4 296
5 1724
6 11060
7 74527
8 533046
9 3999187
10 31412182
11 257150093
12 2188063401
13 19299062896
14 176059781439
15 1657961491087
16 16089088019098
17 160643776819423
18 1648068916722737
19 17351137043998280
20 187255329043638437
21 2069426416836401375
22 23397468305569068113
23 270406562951254606048
24 3191908298072118225550
25 38454691427657997701136

List of values

[1, 2, 11, 52, 296, 1724, 11060, 74527, 533046, 3999187, 31412182, 257150093, 2188063401, 19299062896, 176059781439, 1657961491087, 16089088019098, 160643776819423, 1648068916722737, 17351137043998280, 187255329043638437, 2069426416836401375, 23397468305569068113, 270406562951254606048, 3191908298072118225550, 38454691427657997701136]

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

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