A281204 - cp's OEIS frontend

A281204 Number of n X 7 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	20
2	166
3	537
4	1358
5	3137
6	6838
7	14375
8	29416
9	58984
10	116466
11	227134
12	438532
13	839659
14	1596460
15	3017310
16	5673426
17	10619999
18	19801344
19	36791933
20	68149580
21	125882603
22	231941798
23	426388234
24	782226746
25	1432314394
26	2618121324
27	4778002317

[20, 166, 537, 1358, 3137, 6838, 14375, 29416, 58984, 116466, 227134, 438532, 839659, 1596460, 3017310, 5673426, 10619999, 19801344, 36791933, 68149580, 125882603, 231941798, 426388234, 782226746, 1432314394, 2618121324, 4778002317]

cp's OEIS Frontend

A281204 Number of n X 7 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