A223283 - cp's OEIS frontend

A223283 Rolling icosahedron face footprints: number of 2 X n 0..19 arrays starting with 0 where 0..19 label faces of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves across an icosahedral edge.

n	a(n)
1	20
2	15
3	87
4	351
5	1575
6	6831
7	29943
8	130815
9	572103
10	2501199
11	10936215
12	47815839
13	209064807
14	914089455
15	3996657207
16	17474508351
17	76403468295
18	334057454991
19	1460593174743
20	6386124254175
21	27921931810983
22	122082540957999

[20, 15, 87, 351, 1575, 6831, 29943, 130815, 572103, 2501199, 10936215, 47815839, 209064807, 914089455, 3996657207, 17474508351, 76403468295, 334057454991, 1460593174743, 6386124254175, 27921931810983, 122082540957999]

cp's OEIS Frontend

A223283 Rolling icosahedron face footprints: number of 2 X n 0..19 arrays starting with 0 where 0..19 label faces of an icosahedron and every array movement to a horizontal, diagonal or antidiagonal neighbor moves across an icosahedral edge.

Table of values

List of values