A221899 - cp's OEIS frontend

A221899 Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.

n	a(n)
1	3
2	31
3	258
4	2241
5	19408
6	167960
7	1453952
8	12585637
9	108943526
10	943035150
11	8163084148
12	70661144632
13	611655753520
14	5294603734144
15	45831055372945
16	396721972412987
17	3434097733826959
18	29726176177614458
19	257315201439500033

[3, 31, 258, 2241, 19408, 167960, 1453952, 12585637, 108943526, 943035150, 8163084148, 70661144632, 611655753520, 5294603734144, 45831055372945, 396721972412987, 3434097733826959, 29726176177614458, 257315201439500033]

cp's OEIS Frontend

A221899 Number of 2 X n arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without move-in move-out straight through or left turns.

Table of values

List of values