A302068 Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

64, 2778, 89658, 3247765, 119508742, 4418931065, 163660519064, 6065045335103, 224815724811979, 8334107796606201, 308963355935563199, 11454095498949273706, 424636110620978141873, 15742508225166053482704

Offset: 1

Author

R. H. Hardin, Mar 31 2018

Keywords

• nonn

Comments

Column 7 of A302069.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 53

Crossrefs

Cf. A302069.

Formula

Empirical recurrence of order 53 (see link above)