A320406 Number of nX5 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

16, 95, 548, 3761, 27236, 191615, 1353623, 9623424, 68454701, 487378041, 3471554122, 24729497665, 176166804149, 1255112001383, 8941934679343, 63707927676802, 453894992622140, 3233839557918619, 23040000280256652

Offset

1,1

Comments

Column 5 of A320409.

Links

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

Example

Some solutions for n=5
..0..0..0..0..0. .0..1..1..0..1. .0..0..0..1..0. .0..0..0..1..0
..0..0..0..0..0. .1..1..1..1..0. .0..0..0..0..1. .1..0..0..0..1
..1..0..1..1..0. .1..1..0..0..0. .0..0..0..0..0. .0..0..0..0..0
..0..0..0..1..0. .0..1..0..0..0. .0..1..0..1..0. .1..1..1..0..0
..0..1..0..0..0. .1..0..0..0..1. .0..1..1..1..0. .1..1..0..0..0

Crossrefs

Cf. A320409.

Sequence in context: A066487 A318021 A333511 * A241936 A321338 A128702

Adjacent sequences: A320403 A320404 A320405 * A320407 A320408 A320409

Keyword

nonn

Author

R. H. Hardin, Oct 12 2018

Status

approved