A222680 Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

2, 1, 5, 10, 25, 150, 359, 2249, 6511, 39991, 119033, 747758, 2254819, 14115927, 43486517, 268330409, 844434635, 5129191736, 16468845241, 98454511005, 322307191185, 1896450581728, 6325288982445, 36644084370361, 124416281370753

Offset: 1

Author

R. H. Hardin Feb 28 2013

Keywords

• nonn

Comments

Row 2 of A222679

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..45