A278189 - cp's OEIS frontend

A278189 Number of 2 X n 0..3 arrays with every element plus 1 mod 4 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

n	a(n)
1	0
2	3
3	19
4	136
5	935
6	6381
7	43478
8	296105
9	2016307
10	13729364
11	93484479
12	636542307
13	4334257038
14	29512224731
15	200950553535
16	1368284654492
17	9316734157423
18	63438214373401
19	431954692843542
20	2941205998493005
21	20026852048660187

[0, 3, 19, 136, 935, 6381, 43478, 296105, 2016307, 13729364, 93484479, 636542307, 4334257038, 29512224731, 200950553535, 1368284654492, 9316734157423, 63438214373401, 431954692843542, 2941205998493005, 20026852048660187]

cp's OEIS Frontend

A278189 Number of 2 X n 0..3 arrays with every element plus 1 mod 4 equal to some element at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

Table of values

List of values