A318034 Number of nX5 0..1 arrays with every element unequal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 22, 58, 176, 580, 1910, 6525, 23463, 84609, 306640, 1111482, 4032505, 14616910, 53018958, 192322953, 697961938, 2533165534, 9196221022, 33385800165, 121213219813, 440082870925, 1597796754931, 5801007561770, 21061276047942

Offset

1,1

Comments

Column 5 of A318037.

Links

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

Example

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

Crossrefs

Cf. A318037.

Sequence in context: A058404 A350123 A211479 * A326162 A126362 A140418

Adjacent sequences: A318031 A318032 A318033 * A318035 A318036 A318037

Keyword

nonn

Author

R. H. Hardin, Aug 13 2018

Status

approved