A233141 - cp's OEIS frontend

A233141 Number of n X 2 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

n	a(n)
1	2
2	16
3	225
4	3727
5	65120
6	1158334
7	20726079
8	371568349
9	6665506622
10	119595908140
11	2145992981277
12	38507882245867
13	690993582249116
14	12399363162575962
15	222497465035339899
16	3992554551056534713
17	71643481793789018234

[2, 16, 225, 3727, 65120, 1158334, 20726079, 371568349, 6665506622, 119595908140, 2145992981277, 38507882245867, 690993582249116, 12399363162575962, 222497465035339899, 3992554551056534713, 71643481793789018234]

cp's OEIS Frontend

A233141 Number of n X 2 0..5 arrays with no element x(i,j) adjacent to value 5-x(i,j) horizontally, antidiagonally or vertically, top left element zero, and 1 appearing before 2 3 and 4, and 2 appearing before 3 in row major order.

Table of values

List of values