A303258 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 1172, 28680, 349273, 11394429, 306224454, 7600681910, 204093228252, 5314350209386, 138643667659572, 3640560048826152, 95207607193735652, 2491557031345822081, 65239890207048823769, 1707524253811111768156

Offset: 1

Author

R. H. Hardin, Apr 20 2018

Keywords

• nonn

Comments

Row 7 of A303254.

Examples

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

Links

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

Crossrefs

Cf. A303254.