A284193 - cp's OEIS frontend

A284193 Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally 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	40
5	131
6	455
7	1611
8	5818
9	21328
10	78965
11	294721
12	1107257
13	4182655
14	15873631
15	60485153
16	231287810
17	887184904
18	3412621088
19	13159857176
20	50862414259
21	196984720481
22	764321821293
23	2970680947542
24	11563991293971
25	45079009826426

[2, 4, 13, 40, 131, 455, 1611, 5818, 21328, 78965, 294721, 1107257, 4182655, 15873631, 60485153, 231287810, 887184904, 3412621088, 13159857176, 50862414259, 196984720481, 764321821293, 2970680947542, 11563991293971, 45079009826426]

cp's OEIS Frontend

A284193 Number of n X 2 0..1 arrays with the number of 1's horizontally, antidiagonally 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