A222567 Number of nX2 0..2 arrays with no more than floor(nX2/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

1, 1, 5, 18, 59, 200, 820, 3014, 11364, 42748, 164652, 627034, 2399454, 9229494, 35487202, 137093302, 528389870, 2048668614, 7920616338, 30777407006, 119302534874, 464420087686, 1804371752146, 7034061387558, 27382292281570

Offset: 1

Author

R. H. Hardin Feb 25 2013

Keywords

• nonn

Comments

Column 2 of A222573

Examples

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

Links

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