A284223 - cp's OEIS frontend

A284223 Number of 2 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

n	a(n)
1	2
2	6
3	13
4	44
5	143
6	495
7	1746
8	6399
9	23776
10	89321
11	337909
12	1285710
13	4914573
14	18861581
15	72633154
16	280492954
17	1085801918
18	4211904917
19	16367963509
20	63710308355
21	248341387058
22	969279971828
23	3787525164193
24	14815659532381
25	58010290470976

[2, 6, 13, 44, 143, 495, 1746, 6399, 23776, 89321, 337909, 1285710, 4914573, 18861581, 72633154, 280492954, 1085801918, 4211904917, 16367963509, 63710308355, 248341387058, 969279971828, 3787525164193, 14815659532381, 58010290470976]

cp's OEIS Frontend

A284223 Number of 2 X n 0..1 arrays with the number of 1's horizontally or antidiagonally adjacent to some 0 equal to the number of 0's adjacent to some 1, with top left element zero.

Table of values

List of values