A113202 - cp's OEIS frontend

A113202 Number of isomorphism classes of simple quadrangulations of the sphere having n vertices and n-2 faces, with orientation-reversing isomorphisms forbidden.

n	a(n)
4	1
5	1
6	2
7	3
8	10
9	21
10	83
11	298
12	1339
13	6049
14	29765
15	148842
16	770267
17	4054539
18	21743705
19	118237471
20	651370528
21	3628421181
22	20416662314
23	115919209155
24	663548898942
25	3826577783917
26	22217382001865
27	129800215435088

[1, 1, 2, 3, 10, 21, 83, 298, 1339, 6049, 29765, 148842, 770267, 4054539, 21743705, 118237471, 651370528, 3628421181, 20416662314, 115919209155, 663548898942, 3826577783917, 22217382001865, 129800215435088]

cp's OEIS Frontend

A113202 Number of isomorphism classes of simple quadrangulations of the sphere having n vertices and n-2 faces, with orientation-reversing isomorphisms forbidden.

Table of values

List of values