A221930 - cp's OEIS frontend

A221930 Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

n	a(n)
1	1
2	25
3	232
4	2197
5	20933
6	198589
7	1885324
8	17896442
9	169874679
10	1612469540
11	15305706000
12	145283086944
13	1379039583394
14	13089962041815
15	124251041949203
16	1179401540313291
17	11194980504773785
18	106263714435179508

[1, 25, 232, 2197, 20933, 198589, 1885324, 17896442, 169874679, 1612469540, 15305706000, 145283086944, 1379039583394, 13089962041815, 124251041949203, 1179401540313291, 11194980504773785, 106263714435179508]

cp's OEIS Frontend

A221930 Number of 2Xn arrays of occupancy after each element stays put or moves to some horizontal, diagonal or antidiagonal neighbor, without move-in move-out straight through or left turns.

Table of values

List of values