A301911 Number of 7Xn 0..1 arrays with every element equal to 0, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 1, 117, 65, 196, 1999, 8781, 104732, 770376, 7398173, 75183520, 712349998, 7178506389, 72042620797, 721879978606, 7250047119979, 72777298549367, 730558484014599, 7332580130417856, 73594615185044259, 738663477116841069

Offset: 1

Author

R. H. Hardin, Mar 28 2018

Keywords

• nonn

Comments

Row 7 of A301906.

Examples

			Some solutions for n=5
..0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0. .0..1..1..0..1
..1..1..0..0..1. .1..1..0..0..1. .1..1..0..0..1. .1..1..1..0..1
..1..1..1..0..1. .1..1..0..0..0. .1..1..1..0..1. .0..1..1..0..1
..1..1..1..0..0. .1..1..1..0..0. .0..1..1..0..0. .0..1..1..0..0
..0..1..0..0..0. .1..1..0..0..1. .0..1..0..0..1. .1..1..0..0..1
..1..1..1..0..0. .0..1..1..0..0. .1..1..1..0..0. .0..1..1..0..0
..1..1..0..0..1. .1..1..0..0..1. .1..1..0..0..1. .1..1..0..0..1
		

Links

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

Crossrefs

Cf. A301906.