A222283 Number of nX1 0..1 arrays with exactly floor(nX1/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..1 order.

1, 0, 0, 3, 4, 4, 5, 20, 27, 48, 63, 175, 236, 512, 684, 1719, 2320, 5400, 7271, 17776, 24036, 57420, 77636, 188656, 255591, 617176, 836595, 2033175, 2759184, 6697744, 9094949, 22139780, 30086955, 73262232, 99615081, 242931321, 330503120

Offset: 1

Author

R. H. Hardin Feb 14 2013

Keywords

• nonn

Comments

Column 1 of A222290

Examples

			All solutions for n=4
..0....0....0
..1....0....0
..1....0....1
..1....1....1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210