A300471 Number of n X 7 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 5536, 180397, 7121067, 284885784, 11408562672, 456303004550, 18253046515989, 730219136878799, 29212758892049864, 1168662232086807413, 46752555205748619684, 1870345397930689285305, 74823548553594183996315

Offset: 1

Author

R. H. Hardin, Mar 06 2018

Keywords

• nonn

Comments

Column 7 of A300472.

Examples

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

Links

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

Crossrefs

Cf. A300472.