A281051 - cp's OEIS frontend

A281051 Number of n X 3 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	0
2	6
3	68
4	376
5	1492
6	4988
7	15028
8	42252
9	113076
10	291660
11	731060
12	1791052
13	4306868
14	10197068
15	23828404
16	55060556
17	125999028
18	285894732
19	643864500
20	1440442444
21	3203438516
22	7086237772
23	15599703988
24	34190878796
25	74638727092
26	162339448908

[0, 6, 68, 376, 1492, 4988, 15028, 42252, 113076, 291660, 731060, 1791052, 4306868, 10197068, 23828404, 55060556, 125999028, 285894732, 643864500, 1440442444, 3203438516, 7086237772, 15599703988, 34190878796, 74638727092, 162339448908]

cp's OEIS Frontend

A281051 Number of n X 3 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values