A222450 Number of nX2 0..1 arrays with exactly floor(nX2/2) elements unequal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..1 order.

0, 0, 2, 7, 10, 23, 64, 175, 400, 983, 2498, 6409, 15982, 40282, 102240, 260590, 662008, 1685764, 4301724, 10996863, 28122246, 71995471, 184507156, 473312401, 1215008846, 3121272497, 8023924572, 20640895689, 53127720534, 136821537884

Offset: 1

Author

R. H. Hardin Feb 20 2013

Keywords

• nonn

Comments

Column 2 of A222456

Examples

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

Links

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