A301955 Number of 6Xn 0..1 arrays with every element equal to 1, 2 or 3 horizontally or antidiagonally adjacent elements, with upper left element zero.

0, 89, 1411, 56710, 1608681, 58609226, 1969215107, 67333850084, 2287773842566, 77959998302605, 2653916633152707, 90371628086108933, 3077076307444521060, 104774663297551634379, 3567555401986729558326, 121474804497455764013977

Offset: 1

Author

R. H. Hardin, Mar 29 2018

Keywords

• nonn

Comments

Row 6 of A301951.

Examples

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

Links

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

Crossrefs

Cf. A301951.