A300369 Number of nX5 0..1 arrays with every element equal to 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 3, 3, 4, 32, 92, 270, 1262, 3561, 13976, 48859, 173602, 622502, 2233811, 7882027, 28343929, 100832747, 360076171, 1284751998, 4584944102, 16356781324, 58381988677, 208293028674, 743376640816, 2652427350327, 9465170814378

Offset

1,2

Comments

Column 5 of A300372.

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..1. .0..0..1..0..0. .0..0..0..0..1
..0..1..0..1..1. .0..1..0..1..1. .0..1..1..0..1. .0..1..0..1..1
..1..1..0..0..0. .1..1..0..0..0. .0..0..0..1..1. .1..1..1..0..0
..0..0..1..1..0. .0..0..1..0..1. .1..1..0..0..1. .0..0..1..0..1
..0..1..1..0..0. .0..1..1..1..1. .1..1..0..1..1. .0..0..1..1..1

Crossrefs

Cf. A300372.

Sequence in context: A266067 A300368 A306521 * A304296 A076183 A348679

Adjacent sequences: A300366 A300367 A300368 * A300370 A300371 A300372

Keyword

nonn

Author

R. H. Hardin, Mar 04 2018

Status

approved