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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.

A103939 Number of unrooted Eulerian n-edge maps in the plane (planar with a distinguished outside face).

Table of values

n a(n)
0 1
1 1
2 3
3 8
4 32
5 136
6 722
7 3924
8 22954
9 138316
10 860364
11 5472444
12 35503288
13 234070648
14 1564945158
15 10589356592
16 72412611194
17 499788291616
18 3478059566250
19 24383023246284
20 172074483068320
21 1221654305104920
22 8720583728414354
23 62560709120463028
24 450854177292364660

List of values

[1, 1, 3, 8, 32, 136, 722, 3924, 22954, 138316, 860364, 5472444, 35503288, 234070648, 1564945158, 10589356592, 72412611194, 499788291616, 3478059566250, 24383023246284, 172074483068320, 1221654305104920, 8720583728414354, 62560709120463028, 450854177292364660]

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

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