A269199 Number of nX6 0..3 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling three no more than once.

2592, 472044, 84310620, 13753913556, 2135938293684, 320994710282892, 47121391706947500, 6796525936086462132, 966936595386067680804, 136062368474581143710892, 18974537404982889834704892

Offset: 1

Author

R. H. Hardin, Feb 20 2016

Keywords

• nonn

Comments

Column 6 of A269201.

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210
• R. H. Hardin, Empirical recurrence of order 42

Crossrefs

Cf. A269201.

Formula

Empirical recurrence of order 42 (see link above)