A069731 - cp's OEIS frontend

A069731 Number of unicursal planar maps with n edges rooted at a vertex of odd valency (unicursal means that exactly two vertices are of odd valency; there is an Eulerian path).

n	a(n)
1	1
2	5
3	28
4	168
5	1056
6	6864
7	45760
8	311168
9	2149888
10	15049216
11	106502144
12	760729600
13	5477253120
14	39710085120
15	289650032640
16	2124100239360
17	15651264921600
18	115819360419840
19	860372391690240

[1, 5, 28, 168, 1056, 6864, 45760, 311168, 2149888, 15049216, 106502144, 760729600, 5477253120, 39710085120, 289650032640, 2124100239360, 15651264921600, 115819360419840, 860372391690240]

cp's OEIS Frontend

A069731 Number of unicursal planar maps with n edges rooted at a vertex of odd valency (unicursal means that exactly two vertices are of odd valency; there is an Eulerian path).

Table of values

List of values