A281057 - cp's OEIS frontend

A281057 Number of 2 X n 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	1
3	6
4	34
5	104
6	251
7	535
8	1076
9	2090
10	3956
11	7353
12	13474
13	24417
14	43846
15	78142
16	138374
17	243687
18	427098
19	745403
20	1296072
21	2246018
22	3880504
23	6686165
24	11491746
25	19706373
26	33722458
27	57596214
28	98195818
29	167136611
30	284039674
31	482013727
32	816869276

[0, 1, 6, 34, 104, 251, 535, 1076, 2090, 3956, 7353, 13474, 24417, 43846, 78142, 138374, 243687, 427098, 745403, 1296072, 2246018, 3880504, 6686165, 11491746, 19706373, 33722458, 57596214, 98195818, 167136611, 284039674, 482013727, 816869276]

cp's OEIS Frontend

A281057 Number of 2 X n 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