A300464 Number of nX7 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 41, 212, 2585, 55663, 935121, 17675111, 330639367, 6123205255, 114735094931, 2136975985538, 39899944005038, 744635053156875, 13895291324256516, 259332066899793610, 4839626748377777725, 90318818165804970003

Offset: 1

Author

R. H. Hardin, Mar 06 2018

Keywords

• nonn

Comments

Column 7 of A300465.

Examples

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

Links

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

Crossrefs

Cf. A300465.