A317893 Number of nX5 0..1 arrays with every element unequal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 5, 59, 549, 6193, 67792, 741031, 8119416, 88900423, 973425343, 10659656523, 116727563443, 1278205487608, 13996816969414, 153270295230335, 1678365696618678, 18378717159170458, 201253665901097643

Offset

1,2

Comments

Column 5 of A317896.

Links

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

Example

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

Crossrefs

Cf. A317896.

Sequence in context: A112461 A222585 A260630 * A106105 A178003 A036947

Adjacent sequences: A317890 A317891 A317892 * A317894 A317895 A317896

Keyword

nonn

Author

R. H. Hardin, Aug 10 2018

Status

approved