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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.

A360864 Number of unlabeled connected multigraphs with circuit rank n and degree >= 3 at each node, loops allowed.

Table of values

n a(n)
1 0
2 3
3 15
4 111
5 1076
6 13870
7 220520
8 4185406
9 92235118
10 2314204852
11 65129484278
12 2032179006943
13 69640160993587
14 2600585852722150
15 105127528809344785
16 4574251821427917425
17 213171992131468465801
18 10593983324971249199532
19 559293301762878627195807
20 31259896932477899016109585
21 1844062168535890557437809526

List of values

[0, 3, 15, 111, 1076, 13870, 220520, 4185406, 92235118, 2314204852, 65129484278, 2032179006943, 69640160993587, 2600585852722150, 105127528809344785, 4574251821427917425, 213171992131468465801, 10593983324971249199532, 559293301762878627195807, 31259896932477899016109585, 1844062168535890557437809526]

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

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