A222324 Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order.

3, 7, 19, 52, 165, 835, 3307, 14419, 66213, 302731, 1350601, 6283864, 28864821, 132830017, 617677553, 2862431936, 13363660417, 62171655121, 291908874951, 1362607426103, 6418589261153, 30080186463929, 142028701850239

Offset: 1

Author

R. H. Hardin Feb 15 2013

Keywords

• nonn

Comments

Column 4 of A222328

Examples

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

Links

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