A230676 - cp's OEIS frontend

A230676 Number of 2 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

n	a(n)
1	0
2	15
3	87
4	513
5	3387
6	21933
7	141411
8	913245
9	5898099
10	38088477
11	245968275
12	1588424445
13	10257784563
14	66243081501
15	427786930899
16	2762577674301
17	17840272397235
18	115209545904477
19	744004305214611
20	4804657476983421

[0, 15, 87, 513, 3387, 21933, 141411, 913245, 5898099, 38088477, 245968275, 1588424445, 10257784563, 66243081501, 427786930899, 2762577674301, 17840272397235, 115209545904477, 744004305214611, 4804657476983421]

cp's OEIS Frontend

A230676 Number of 2 X n 0..2 arrays x(i,j) with each element horizontally, diagonally or antidiagonally next to at least one element with value 2-x(i,j).

Table of values

List of values