A269295 Number of 7Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.

16384, 34012224, 26317946844, 17623065834612, 10908770041709316, 6444304707617709156, 3689070798270477232620, 2064575194564255507198260, 1135872003598654165478951652, 616641759542150716175805966228

Offset: 1

Author

R. H. Hardin, Feb 21 2016

Keywords

• nonn

Comments

Row 7 of A269289.

Examples

			Some solutions for n=2
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0. .0..0
..2..3. .0..1. .1..1. .2..0. .2..3. .2..2. .2..0. .2..2. .2..1. .2..2
..0..2. .0..0. .1..0. .3..1. .3..3. .0..1. .3..1. .0..0. .1..3. .0..0
..2..0. .1..3. .1..2. .0..0. .3..1. .2..0. .1..3. .1..3. .3..2. .1..0
..2..3. .3..3. .0..0. .1..1. .0..0. .2..2. .2..3. .2..2. .0..0. .3..1
..1..1. .1..2. .0..0. .1..3. .1..0. .2..2. .2..2. .2..0. .2..2. .0..1
		

Links

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

Crossrefs

Cf. A269289.