cp's OEIS Frontend

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.

A054935 Number of planar maps with n edges up to orientation-preserving duality.

Table of values

n a(n)
1 1
2 3
3 7
4 33
5 156
6 1070
7 7515
8 59151
9 483925
10 4136964
11 36416865
12 329048627
13 3037029030
14 28553451498
15 272766018806
16 2642420298576
17 25916954091582
18 257009789443925
19 2573962338306141
20 26008719387850068
21 264933535266372732

List of values

[1, 3, 7, 33, 156, 1070, 7515, 59151, 483925, 4136964, 36416865, 329048627, 3037029030, 28553451498, 272766018806, 2642420298576, 25916954091582, 257009789443925, 2573962338306141, 26008719387850068, 264933535266372732]

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

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