A233083 - cp's OEIS frontend

A233083 Number of 2 X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order.

n	a(n)
1	3
2	14
3	95
4	662
5	4631
6	32414
7	226895
8	1588262
9	11117831
10	77824814
11	544773695
12	3813415862
13	26693911031
14	186857377214
15	1308001640495
16	9156011483462
17	64092080384231
18	448644562689614
19	3140511938827295
20	21983583571791062

[3, 14, 95, 662, 4631, 32414, 226895, 1588262, 11117831, 77824814, 544773695, 3813415862, 26693911031, 186857377214, 1308001640495, 9156011483462, 64092080384231, 448644562689614, 3140511938827295, 21983583571791062]

cp's OEIS Frontend

A233083 Number of 2 X n 0..3 arrays with no element x(i,j) adjacent to value 3-x(i,j) horizontally or antidiagonally, top left element zero, and 1 appearing before 2 in row major order.

Table of values

List of values