A300464 Number of nX7 0..1 arrays with every element equal to 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 41, 212, 2585, 55663, 935121, 17675111, 330639367, 6123205255, 114735094931, 2136975985538, 39899944005038, 744635053156875, 13895291324256516, 259332066899793610, 4839626748377777725, 90318818165804970003

Offset

1,2

Comments

Column 7 of A300465.

Links

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

Example

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

Crossrefs

Cf. A300465.

Sequence in context: A204620 A172085 A251094 * A326228 A142392 A142943

Adjacent sequences: A300461 A300462 A300463 * A300465 A300466 A300467

Keyword

nonn

Author

R. H. Hardin, Mar 06 2018

Status

approved