A302471 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

8, 1934, 21843, 584333, 12546601, 278275383, 6145486847, 137317050228, 3037409718914, 67479138025096, 1498702560639572, 33260815033321880, 738459050330835570, 16395573840831348665, 363975603158138097907

Offset

1,1

Comments

Column 7 of A302472.

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..1..0..0..1. .0..1..1..0..0..1..0
..0..0..0..1..0..1..0. .0..1..1..0..0..1..0. .0..0..1..1..0..0..1
..0..1..0..0..1..0..0. .0..0..0..1..0..1..1. .0..0..1..1..0..0..0
..0..0..1..1..1..0..1. .0..0..0..1..0..1..0. .0..0..1..0..0..1..0
..0..0..0..0..0..1..0. .0..0..1..1..1..0..0. .0..0..1..1..0..0..1

Crossrefs

Cf. A302472.

Sequence in context: A299606 A302223 A302669 * A303253 A076955 A362292

Adjacent sequences: A302468 A302469 A302470 * A302472 A302473 A302474

Keyword

nonn

Author

R. H. Hardin, Apr 08 2018

Status

approved