A302223 Number of n X 7 0..1 arrays with every element equal to 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 1934, 15569, 251254, 3018243, 42508145, 553097760, 7403262824, 97939043966, 1301831347709, 17275065368012, 229303687769069, 3043569120232324, 40395942785616147, 536209245725631300, 7116991167351864042

Offset: 1

Author

R. H. Hardin, Apr 03 2018

Keywords

• nonn

Comments

Column 7 of A302224.

Examples

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

Links

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

Crossrefs

Cf. A302224.