A112944 - cp's OEIS frontend

A112944 Number of unrooted regular odd-valent planar maps with 2 vertices; maps are considered up to orientation-preserving homeomorphisms and the vertices are of valency 2n+1.

n	a(n)
0	1
1	2
2	7
3	39
4	308
5	3013
6	33300
7	394340
8	4878109
9	62232321
10	812825244
11	10818489817
12	146250545528
13	2003199281223
14	27747288947266
15	388087900316025
16	5474206895126243
17	77795972452841542
18	1112947041203866164
19	16016508647052018408
20	231727628211887783830
21	3368855109532696440867

[1, 2, 7, 39, 308, 3013, 33300, 394340, 4878109, 62232321, 812825244, 10818489817, 146250545528, 2003199281223, 27747288947266, 388087900316025, 5474206895126243, 77795972452841542, 1112947041203866164, 16016508647052018408, 231727628211887783830, 3368855109532696440867]

cp's OEIS Frontend

A112944 Number of unrooted regular odd-valent planar maps with 2 vertices; maps are considered up to orientation-preserving homeomorphisms and the vertices are of valency 2n+1.

Table of values

List of values