A222762 Number of n X n 0..1 arrays with exactly floor(n X n/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

1, 3, 13, 465, 19766, 4479721, 1139211468, 1529339764557, 2262949907256195, 17477638597595547101, 147986778995780201368346, 6492535454463031607390365256

Offset: 1

Author

R. H. Hardin Mar 05 2013

Keywords

• nonn

Comments

Diagonal of A222769

Examples

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