A219136 - cp's OEIS frontend

A219136 Unchanging value maps: number of n X 2 binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 n X 2 array.

n	a(n)
1	2
2	6
3	18
4	51
5	142
6	405
7	1157
8	3289
9	9344
10	26580
11	75621
12	215076
13	611683
14	1739781
15	4948421
16	14074414
17	40030688
18	113856507
19	323834334
20	921058929
21	2619701953
22	7451032833
23	21192445976
24	60276171664
25	171439240421
26	487612482144

[2, 6, 18, 51, 142, 405, 1157, 3289, 9344, 26580, 75621, 215076, 611683, 1739781, 4948421, 14074414, 40030688, 113856507, 323834334, 921058929, 2619701953, 7451032833, 21192445976, 60276171664, 171439240421, 487612482144]

cp's OEIS Frontend

A219136 Unchanging value maps: number of n X 2 binary arrays indicating the locations of corresponding elements unequal to no horizontal, diagonal or antidiagonal neighbor in a random 0..2 n X 2 array.

Table of values

List of values