A222510 Number of 2Xn 0..1 arrays with exactly floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

0, 0, 4, 3, 10, 32, 44, 176, 326, 888, 2076, 5275, 12306, 32324, 74284, 195959, 460498, 1189652, 2861016, 7307596, 17774488, 45231012, 110756056, 281073368, 692630902, 1752734824, 4342317676, 10967047059, 27278066490, 68820679380, 171685581996

Offset: 1

Author

R. H. Hardin Feb 23 2013

Keywords

• nonn

Comments

Row 2 of A222509

Examples

			All solutions for n=3
..0..0..1....0..0..0....0..1..1....0..0..0
..0..0..0....0..0..1....1..1..1....1..0..0
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..123