A222771 Number of 3Xn 0..1 arrays with exactly floor(3Xn/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..1 order.

0, 4, 13, 66, 158, 934, 2446, 14567, 39972, 240130, 673665, 4073862, 11545686, 70212506, 200446066, 1224207384, 3512430906, 21526789216, 62001340484, 381049009426, 1100824791540, 6780941436208, 19637801359798, 121196222602133

Offset: 1

Author

R. H. Hardin Mar 05 2013

Keywords

• nonn

Comments

Row 3 of A222769

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..48