A281200 - cp's OEIS frontend

A281200 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 one element, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	1
2	14
3	56
4	168
5	448
6	1120
7	2688
8	6272
9	14336
10	32256
11	71680
12	157696
13	344064
14	745472
15	1605632
16	3440640
17	7340032
18	15597568
19	33030144
20	69730304
21	146800640
22	308281344
23	645922816
24	1350565888
25	2818572288
26	5872025600
27	12213813248
28	25367150592

[1, 14, 56, 168, 448, 1120, 2688, 6272, 14336, 32256, 71680, 157696, 344064, 745472, 1605632, 3440640, 7340032, 15597568, 33030144, 69730304, 146800640, 308281344, 645922816, 1350565888, 2818572288, 5872025600, 12213813248, 25367150592]

cp's OEIS Frontend

A281200 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 one element, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values