A302149 Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

1, 10, 88, 1038, 12212, 145150, 1728734, 20614702, 245896061, 2933505447, 34997746793, 417542364526, 4981538616301, 59432971386326, 709074352774052, 8459725853179692, 100930145043164198, 1204163804664423408

Offset: 1

Author

R. H. Hardin, Apr 02 2018

Keywords

• nonn

Comments

Column 7 of A302150.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 51

Crossrefs

Cf. A302150.

Formula

Empirical recurrence of order 51 (see link above)