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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.

A002094 Number of unlabeled connected loop-less graphs on n nodes containing exactly one cycle (of length at least 2) and with all nodes of degree <= 4.

Table of values

n a(n)
1 0
2 1
3 2
4 5
5 10
6 25
7 56
8 139
9 338
10 852
11 2145
12 5513
13 14196
14 36962
15 96641
16 254279
17 671640
18 1781840
19 4742295
20 12662282
21 33898923
22 90981264
23 244720490
24 659591378
25 1781048728
26 4817420360
27 13050525328
28 35405239155
29 96180222540
30 261603173201
31 712364210543

List of values

[0, 1, 2, 5, 10, 25, 56, 139, 338, 852, 2145, 5513, 14196, 36962, 96641, 254279, 671640, 1781840, 4742295, 12662282, 33898923, 90981264, 244720490, 659591378, 1781048728, 4817420360, 13050525328, 35405239155, 96180222540, 261603173201, 712364210543]

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

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