A300775 Number of nX7 0..1 arrays with every element equal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 41, 330, 3482, 78932, 1413931, 27354464, 538564737, 10457318118, 204864839579, 4003320568347, 78291006560110, 1531185041826193, 29942985522306312, 585589511612781035, 11452027270290422629, 223961431020068238434

Offset: 1

Author

R. H. Hardin, Mar 12 2018

Keywords

• nonn

Comments

Column 7 of A300776.

Examples

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

Links

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

Crossrefs

Cf. A300776.