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.

A103938 Number of rooted non-separable n-edge maps in the plane (planar with a distinguished outside face).

Table of values

n a(n)
1 3
2 2
3 5
4 18
5 77
6 364
7 1836
8 9690
9 52877
10 296010
11 1690845
12 9817080
13 57769740
14 343806368
15 2065802056
16 12515350122
17 76367432013
18 468922828150
19 2895381678735
20 17966214519330
21 111977263221285
22 700704492237540
23 4400559613086000
24 27727270719559320
25 175230257041962252

List of values

[3, 2, 5, 18, 77, 364, 1836, 9690, 52877, 296010, 1690845, 9817080, 57769740, 343806368, 2065802056, 12515350122, 76367432013, 468922828150, 2895381678735, 17966214519330, 111977263221285, 700704492237540, 4400559613086000, 27727270719559320, 175230257041962252]

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

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