A222513 - cp's OEIS frontend

A222513 Number of 5Xn 0..1 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

n	a(n)
1	0
2	8
3	87
4	497
5	2066
6	17674
7	81537
8	800040
9	3877847
10	39636760
11	197167116
12	2044535652
13	10266459303
14	107207411996
15	541084890084
16	5674279900642
17	28738733251005
18	302282496834886
19	1535249200603440
20	16185756541061498

[0, 8, 87, 497, 2066, 17674, 81537, 800040, 3877847, 39636760, 197167116, 2044535652, 10266459303, 107207411996, 541084890084, 5674279900642, 28738733251005, 302282496834886, 1535249200603440, 16185756541061498]

cp's OEIS Frontend

A222513 Number of 5Xn 0..1 arrays with exactly floor(5Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

Table of values

List of values