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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.

A378335 Number of n-node connected sensed planar maps with an external face in which all internal faces are triangles.

Table of values

n a(n)
3 1
4 2
5 5
6 23
7 114
8 675
9 4357
10 29692
11 209933
12 1531349
13 11439545
14 87202034
15 676101375
16 5319069978
17 42378741675
18 341403125204
19 2777329727768
20 22790623236250
21 188475690185517
22 1569588986566488
23 13153980294670851
24 110870960421707325
25 939397206702263021

List of values

[1, 2, 5, 23, 114, 675, 4357, 29692, 209933, 1531349, 11439545, 87202034, 676101375, 5319069978, 42378741675, 341403125204, 2777329727768, 22790623236250, 188475690185517, 1569588986566488, 13153980294670851, 110870960421707325, 939397206702263021]

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

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