A269206 Number of 6Xn 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

4096, 1090740, 142233732, 19558138380, 2532677348772, 320994710282892, 39825831571425924, 4865841496644992100, 587133256785089633172, 70137053123425124078748, 8308848756491598850682388

Offset: 1

Author

R. H. Hardin, Feb 20 2016

Keywords

• nonn

Comments

Row 6 of A269201.

Examples

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

Links

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

Crossrefs

Cf. A269201.