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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.

A316698 a(n) is the number of rooted 2-connected triangular maps on the projective plane with n vertices.

Table of values

n a(n)
1 0
2 0
3 1
4 18
5 261
6 3539
7 46695
8 608526
9 7884661
10 101905839
11 1316047599
12 16998339587
13 219699143367
14 2842235616645
15 36809980380883
16 477280717428102
17 6195737611180053
18 80522713890559319
19 1047702563499718623
20 13646946767000964471
21 177947654115176898479

List of values

[0, 0, 1, 18, 261, 3539, 46695, 608526, 7884661, 101905839, 1316047599, 16998339587, 219699143367, 2842235616645, 36809980380883, 477280717428102, 6195737611180053, 80522713890559319, 1047702563499718623, 13646946767000964471, 177947654115176898479]

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

Content is available under The OEIS End-User License Agreement.