A222504 Number of nX3 0..1 arrays with exactly floor(nX3/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

0, 4, 4, 35, 87, 496, 1335, 7552, 21382, 122942, 348597, 2045395, 5812073, 34558802, 98272393, 589386556, 1678849694, 10123122248, 28893573238, 174842616458, 500084523708, 3033764103592, 8694157659203, 52844583851218, 151707321284408

Offset: 1

Author

R. H. Hardin Feb 23 2013

Keywords

• nonn

Comments

Column 3 of A222509

Examples

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

Links

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