A318428 Number of nX6 0..1 arrays with every element unequal to 1, 2, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

5, 511, 1353, 20016, 132039, 1216538, 9600648, 81327718, 665822482, 5547964642, 45869504563, 380741848431, 3154908484252, 26163271819169, 216899879798735, 1798367150917047, 14910277331599425, 123621215328946695

Offset

1,1

Comments

Column 6 of A318430.

Links

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

Example

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

Crossrefs

Cf. A318430.

Sequence in context: A068234 A012741 A317821 * A318096 A249805 A003394

Adjacent sequences: A318425 A318426 A318427 * A318429 A318430 A318431

Keyword

nonn

Author

R. H. Hardin, Aug 26 2018

Status

approved