A280551 - cp's OEIS frontend

A280551 Number of n X 5 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	2
2	87
3	325
4	832
5	1764
6	3438
7	6386
8	11506
9	20389
10	35757
11	62317
12	108150
13	187115
14	322925
15	556071
16	955574
17	1638882
18	2805542
19	4794088
20	8178068
21	13927945
22	23683803
23	40214243
24	68187902
25	115469449
26	195294823
27	329919371
28	556731676
29	938492304

[2, 87, 325, 832, 1764, 3438, 6386, 11506, 20389, 35757, 62317, 108150, 187115, 322925, 556071, 955574, 1638882, 2805542, 4794088, 8178068, 13927945, 23683803, 40214243, 68187902, 115469449, 195294823, 329919371, 556731676, 938492304]

cp's OEIS Frontend

A280551 Number of n X 5 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values