A303241 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 123, 236, 1676, 11111, 90728, 686376, 5320294, 42575026, 345713805, 2801331069, 22819881078, 186805008216, 1528961515269, 12526736579284, 102761508859349, 843215927212293, 6920803923723062, 56822359222413226, 466601882566586351

Offset: 1

Author

R. H. Hardin, Apr 20 2018

Keywords

• nonn

Comments

Column 7 of A303242.

Examples

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

Links

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

Crossrefs

Cf. A303242.