A317812 Number of nX5 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 5, 5, 34, 38, 94, 230, 552, 1397, 3674, 9184, 23878, 60774, 154748, 397244, 1018967, 2615513, 6711959, 17205261, 44124247, 113202760, 290421232, 745101253, 1911622370, 4904294416, 12582199698, 32280536816, 82818477145, 212479820870

Offset

1,2

Comments

Column 5 of A317815.

Links

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

Example

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

Crossrefs

Cf. A317815.

Sequence in context: A270689 A270278 A270725 * A298961 A298721 A299555

Adjacent sequences: A317809 A317810 A317811 * A317813 A317814 A317815

Keyword

nonn

Author

R. H. Hardin, Aug 07 2018

Status

approved