A232155 - cp's OEIS frontend

A232155 Number of n X 2 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.

n	a(n)
1	2
2	18
3	62
4	218
5	746
6	2600
7	9004
8	31262
9	108492
10	376566
11	1307146
12	4537292
13	15750222
14	54673186
15	189786782
16	658806476
17	2286917482
18	7938591212
19	27557292770
20	95659868830
21	332064969492
22	1152700237642
23	4001379292082
24	13890026339060

[2, 18, 62, 218, 746, 2600, 9004, 31262, 108492, 376566, 1307146, 4537292, 15750222, 54673186, 189786782, 658806476, 2286917482, 7938591212, 27557292770, 95659868830, 332064969492, 1152700237642, 4001379292082, 13890026339060]

cp's OEIS Frontend

A232155 Number of n X 2 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal.

Table of values

List of values