A069724 - cp's OEIS frontend

A069724 Number of nonisomorphic unrooted unicursal planar maps with n edges (unicursal means that exactly two vertices are of odd valency; there is an Eulerian path).

n	a(n)
1	1
2	2
3	9
4	38
5	214
6	1253
7	7925
8	51620
9	346307
10	2365886
11	16421359
12	115384738
13	819276830
14	5868540399
15	42357643916
16	307753571520
17	2249048959624
18	16520782751969
19	121915128678131
20	903391034923548
21	6719098772562182

[1, 2, 9, 38, 214, 1253, 7925, 51620, 346307, 2365886, 16421359, 115384738, 819276830, 5868540399, 42357643916, 307753571520, 2249048959624, 16520782751969, 121915128678131, 903391034923548, 6719098772562182]

cp's OEIS Frontend

A069724 Number of nonisomorphic unrooted unicursal planar maps with n edges (unicursal means that exactly two vertices are of odd valency; there is an Eulerian path).

Table of values

List of values