A300497 Number of nX7 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

64, 1063, 3699, 14822, 66166, 291721, 1296506, 5589526, 24694845, 110652439, 496922595, 2235496431, 10093633015, 45708631844, 207362510529, 942134125486, 4286125546700, 19519540829724, 88968137138219, 405767287357238

Offset

1,1

Comments

Column 7 of A300498.

Links

R. H. Hardin, Table of n, a(n) for n = 1..150

Example

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

Crossrefs

Cf. A300498.

Sequence in context: A221247 A280603 A301322 * A300936 A300880 A301490

Adjacent sequences: A300494 A300495 A300496 * A300498 A300499 A300500

Keyword

nonn

Author

R. H. Hardin, Mar 07 2018

Status

approved