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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.

A103940 Number of unrooted bipartite n-edge maps in the plane (planar with a distinguished outside face).

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 18
5 72
6 368
7 1982
8 11514
9 69270
10 430384
11 2736894
12 17752884
13 117039548
14 782480424
15 5294705752
16 36206357114
17 249894328848
18 1739030128872
19 12191512867814
20 86037243899240
21 610827161152012
22 4360291880624504
23 31280354620428378
24 225427088761560916
25 1631398499577667252

List of values

[1, 1, 2, 5, 18, 72, 368, 1982, 11514, 69270, 430384, 2736894, 17752884, 117039548, 782480424, 5294705752, 36206357114, 249894328848, 1739030128872, 12191512867814, 86037243899240, 610827161152012, 4360291880624504, 31280354620428378, 225427088761560916, 1631398499577667252]

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

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