A284159 - cp's OEIS frontend

A284159 Number of n X 2 0..1 arrays with the number of 1's horizontally or vertically 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	4
3	13
4	42
5	134
6	467
7	1689
8	6210
9	23178
10	87336
11	331172
12	1262635
13	4836199
14	18592719
15	71697865
16	277195002
17	1074041216
18	4169581090
19	16214541562
20	63150645344
21	246288102302
22	961707595682
23	3759467766802
24	14711266580343
25	57620439699189

[2, 4, 13, 42, 134, 467, 1689, 6210, 23178, 87336, 331172, 1262635, 4836199, 18592719, 71697865, 277195002, 1074041216, 4169581090, 16214541562, 63150645344, 246288102302, 961707595682, 3759467766802, 14711266580343, 57620439699189]

cp's OEIS Frontend

A284159 Number of n X 2 0..1 arrays with the number of 1's horizontally or vertically 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