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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.

A318103 Number of rooted 2-connected loopless 4-regular maps on the projective plane with n inner faces.

Table of values

n a(n)
2 6
3 21
4 138
5 781
6 4836
7 30099
8 191698
9 1236024
10 8063492
11 53086930
12 352249244
13 2352800079
14 15805224904
15 106702428453
16 723509453442
17 4924851788720
18 33638721268140
19 230477992427450
20 1583550831926508
21 10907729315809642
22 75307599054762424
23 521026923863915206
24 3611800088179535100

List of values

[6, 21, 138, 781, 4836, 30099, 191698, 1236024, 8063492, 53086930, 352249244, 2352800079, 15805224904, 106702428453, 723509453442, 4924851788720, 33638721268140, 230477992427450, 1583550831926508, 10907729315809642, 75307599054762424, 521026923863915206, 3611800088179535100]

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

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