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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.

A292186 Number of rooted unlabeled connected four-regular maps on a compact closed oriented surface with n vertices (and thus 2*n edges), with a(0) = 1.

Table of values

n a(n)
0 1
1 3
2 24
3 297
4 4896
5 100278
6 2450304
7 69533397
8 2247492096
9 81528066378
10 3280382613504
11 145009234904922
12 6986546222800896
13 364418301804218028
14 20459842995693256704
15 1230262900677124568397
16 78884016707711348637696
17 5372823210133041283250178
18 387394283866652086938107904

List of values

[1, 3, 24, 297, 4896, 100278, 2450304, 69533397, 2247492096, 81528066378, 3280382613504, 145009234904922, 6986546222800896, 364418301804218028, 20459842995693256704, 1230262900677124568397, 78884016707711348637696, 5372823210133041283250178, 387394283866652086938107904]

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

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