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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.

A292468 Number of 4-regular maps with n vertices on the torus, up to orientation-preserving and orientation-reversing isomorphisms.

Table of values

n a(n)
1 1
2 4
3 20
4 133
5 1013
6 9209
7 89889
8 929373
9 9880120
10 107087360
11 1174950951
12 13008800489
13 145024885270
14 1625819872988
15 18311555574347
16 207068032188985
17 2349706730746994
18 26745505016101977
19 305267158873891108
20 3492857897924201864

List of values

[1, 4, 20, 133, 1013, 9209, 89889, 929373, 9880120, 107087360, 1174950951, 13008800489, 145024885270, 1625819872988, 18311555574347, 207068032188985, 2349706730746994, 26745505016101977, 305267158873891108, 3492857897924201864]

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

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