A269287 Number of nX6 0..3 arrays with some element plus some horizontally or antidiagonally adjacent neighbor totalling three no more than once.

2592, 1363572, 544118148, 193446959076, 64538382287988, 20680187784811380, 6444304707617709156, 1967513283560471350788, 591384314583314302090068, 175574678705837994574453140, 51607712999525045688100012356

Offset

1,1

Comments

Column 6 of A269289.

Links

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

Formula

Empirical: a(n) = 564*a(n-1) -87462*a(n-2) +2257724*a(n-3) -21169617*a(n-4) +76236552*a(n-5) -92236816*a(n-6) for n>7

Example

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

Crossrefs

Cf. A269289.

Sequence in context: A269107 A035773 A107569 * A204774 A251899 A236598

Adjacent sequences: A269284 A269285 A269286 * A269288 A269289 A269290

Keyword

nonn

Author

R. H. Hardin, Feb 21 2016

Status

approved