A303468 Number of nX7 0..1 arrays with every element equal to 0, 1, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

64, 5135, 160590, 6051850, 239939422, 9459086839, 373571747330, 14793218857797, 585806882371397, 23202000467768644, 919130744522825901, 36411879602020158408, 1442512357425434876243, 57148308915057854768599

Offset

1,1

Comments

Column 7 of A303469.

Links

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

Example

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

Crossrefs

Cf. A303469.

Sequence in context: A302264 A302964 A302807 * A220578 A067821 A283491

Adjacent sequences: A303465 A303466 A303467 * A303469 A303470 A303471

Keyword

nonn

Author

R. H. Hardin, Apr 24 2018

Status

approved