A300462 Number of nX5 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 9, 22, 142, 1146, 7456, 55663, 400028, 2906875, 21162204, 153677233, 1117612488, 8123629685, 59057261422, 429317113075, 3120977422852, 22688267741133, 164934718709179, 1199012026918226, 8716348960310287, 63364478025520501

Offset

1,2

Comments

Column 5 of A300465.

Links

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

Example

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

Crossrefs

Cf. A300465.

Sequence in context: A327150 A264651 A113519 * A123833 A156342 A133769

Adjacent sequences: A300459 A300460 A300461 * A300463 A300464 A300465

Keyword

nonn

Author

R. H. Hardin, Mar 06 2018

Status

approved