A318074 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 190, 404, 861, 2195, 9966, 46884, 184156, 819263, 3703730, 15865269, 69944965, 310937380, 1361781447, 5998215467, 26503896368, 116659469704, 513984726015, 2266966511804, 9989194862172, 44021107304800, 194059543279029

Offset: 1

Author

R. H. Hardin, Aug 15 2018

Keywords

• nonn

Comments

Column 7 of A318075.

Examples

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

Links

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

Crossrefs

Cf. A318075.