A300538 Number of n X 7 0..1 arrays with every element equal to 0, 2, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 304, 1585, 52012, 1220365, 31434011, 831752031, 21825406629, 577067248097, 15264615530025, 403812868628480, 10685809803693442, 282758103332509395, 7482442076882694554, 198001573519763389397, 5239581373201937179149

Offset

1,2

Comments

Column 7 of A300539.

Links

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

Example

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

Crossrefs

Cf. A300539.

Sequence in context: A158932 A270303 A187934 * A300965 A300922 A301530

Adjacent sequences: A300535 A300536 A300537 * A300539 A300540 A300541

Keyword

nonn

Author

R. H. Hardin, Mar 08 2018

Status

approved