A300965 Number of nX7 0..1 arrays with every element equal to 0, 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

1, 304, 2145, 60730, 1550025, 40689759, 1111779576, 30150922994, 822562611004, 22465005602512, 613512002535449, 16760294348765415, 457851342586022696, 12507855255682109142, 341697407091052094924, 9334729194043851996141

Offset

1,2

Comments

Column 7 of A300966.

Links

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

Example

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

Crossrefs

Cf. A300966.

Sequence in context: A270303 A187934 A300538 * A300922 A301530 A172228

Adjacent sequences: A300962 A300963 A300964 * A300966 A300967 A300968

Keyword

nonn

Author

R. H. Hardin, Mar 17 2018

Status

approved