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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.

A378343 Number of n edge connected unsensed planar maps with an external face in which all internal faces are triangles.

Table of values

n a(n)
3 1
4 0
5 1
6 2
7 1
8 4
9 7
10 10
11 22
12 41
13 77
14 167
15 349
16 736
17 1642
18 3627
19 8120
20 18575
21 42548
22 97871
23 228166
24 532484
25 1246778
26 2941748
27 6952421
28 16470326
29 39217775
30 93530974
31 223542903
32 536138078
33 1287943658
34 3099775046
35 7479610688
36 18075710749
37 43755189158
38 106127886654
39 257778445136

List of values

[1, 0, 1, 2, 1, 4, 7, 10, 22, 41, 77, 167, 349, 736, 1642, 3627, 8120, 18575, 42548, 97871, 228166, 532484, 1246778, 2941748, 6952421, 16470326, 39217775, 93530974, 223542903, 536138078, 1287943658, 3099775046, 7479610688, 18075710749, 43755189158, 106127886654, 257778445136]

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

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