A222651 Number of nX2 0..3 arrays with no more than floor(nX2/2) elements equal to at least one king-move neighbor, with new values introduced in row major 0..3 order.

1, 7, 60, 724, 7364, 84816, 927152, 10585088, 119198624, 1364437632, 15584195392, 179262541056, 2063988209152, 23852186896896, 276080500860416, 3202923732204544, 37215026284325888, 433119059193262080

Offset: 1

Author

R. H. Hardin Feb 27 2013

Keywords

• nonn

Comments

Column 2 of A222654

Examples

			Some solutions for n=3
..0..1....0..1....0..0....0..0....0..0....0..1....0..1....0..1....0..1....0..1
..2..2....2..2....0..1....1..0....1..2....0..0....2..0....2..3....0..2....2..1
..0..1....1..2....2..3....2..3....0..3....2..3....3..0....1..0....3..0....3..1
		

Links

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