A078666 - cp's OEIS frontend

A078666 Number of isomorphism classes of simple quadrangulations of the sphere having n+2 vertices and n faces, minimal degree 3, with orientation-reversing isomorphisms permitted.

n	a(n)
6	1
7	0
8	1
9	1
10	3
11	3
12	12
13	19
14	64
15	155
16	510
17	1514
18	5146
19	16966
20	58782
21	203269
22	716607
23	2536201
24	9062402
25	32533568
26	117498072
27	426212952
28	1553048548
29	5681011890
30	20858998805
31	76850220654
32	284057538480
33	1053134292253
34	3915683667721

[1, 0, 1, 1, 3, 3, 12, 19, 64, 155, 510, 1514, 5146, 16966, 58782, 203269, 716607, 2536201, 9062402, 32533568, 117498072, 426212952, 1553048548, 5681011890, 20858998805, 76850220654, 284057538480, 1053134292253, 3915683667721]

cp's OEIS Frontend

A078666 Number of isomorphism classes of simple quadrangulations of the sphere having n+2 vertices and n faces, minimal degree 3, with orientation-reversing isomorphisms permitted.

Table of values

List of values