A221667 - cp's OEIS frontend

A221667 Sum of neighbor maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 2 X n array.

n	a(n)
1	4
2	12
3	64
4	256
5	992
6	4096
7	16384
8	65344
9	262144
10	1048576
11	4193280
12	16777216
13	67108864
14	268430336
15	1073741824
16	4294967296
17	17179844608
18	68719476736
19	274877906944
20	1099511513088
21	4398046511104
22	17592186044416
23	70368743653376

[4, 12, 64, 256, 992, 4096, 16384, 65344, 262144, 1048576, 4193280, 16777216, 67108864, 268430336, 1073741824, 4294967296, 17179844608, 68719476736, 274877906944, 1099511513088, 4398046511104, 17592186044416, 70368743653376]

cp's OEIS Frontend

A221667 Sum of neighbor maps: number of 2 X n binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 2 X n array.

Table of values

List of values