A269281 Number of 6Xn 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three exactly once.

0, 2598156, 938176344, 279339197256, 75556007986536, 19356924219624936, 4786284820998999528, 1154228064358389881112, 273210106596010141952520, 63745055133289730721040968, 14703244384392257014503473256

Offset: 1

Author

R. H. Hardin, Feb 21 2016

Keywords

• nonn

Comments

Row 6 of A269276.

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
..2..0. .2..1. .0..2. .0..2. .0..1. .2..0. .0..0. .2..2. .2..1. .0..1
..1..3. .0..2. .3..0. .1..1. .0..0. .1..1. .3..2. .0..0. .1..1. .0..2
..2..3. .0..0. .0..1. .0..0. .3..3. .3..1. .3..2. .3..1. .0..1. .2..1
..1..0. .2..0. .0..2. .1..0. .3..1. .1..2. .3..3. .3..1. .1..0. .0..2
..1..2. .0..0. .0..2. .1..0. .0..1. .3..1. .3..2. .3..2. .2..3. .0..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 40

Crossrefs

Cf. A269276.

Formula

Empirical recurrence of order 40 (see link above)