A208858 - cp's OEIS frontend

A208858 Number of n X 2 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.

n	a(n)
1	2
2	11
3	127
4	1691
5	23047
6	315203
7	4313071
8	59022155
9	807696535
10	11053048211
11	151257183487
12	2069902880411
13	28325913895207
14	387630456564323
15	5304590398318351
16	72591507756551915
17	993389989178417335

[2, 11, 127, 1691, 23047, 315203, 4313071, 59022155, 807696535, 11053048211, 151257183487, 2069902880411, 28325913895207, 387630456564323, 5304590398318351, 72591507756551915, 993389989178417335]

cp's OEIS Frontend

A208858 Number of n X 2 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than one of its immediate leftward or upward or left-upward diagonal neighbors.

Table of values

List of values