A302459 Number of nX7 0..1 arrays with every element equal to 0, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 123, 140, 1518, 8869, 61254, 404761, 2822737, 19107381, 133223036, 940543590, 6607193483, 46568712258, 329320886502, 2326854046675, 16446895955352, 116374820631423, 823487172775195, 5827287415111296, 41246655697979835

Offset

1,2

Comments

Column 7 of A302460.

Links

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

Example

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

Crossrefs

Cf. A302460.

Sequence in context: A247616 A119426 A138059 * A179127 A153254 A360639

Adjacent sequences: A302456 A302457 A302458 * A302460 A302461 A302462

Keyword

nonn

Author

R. H. Hardin, Apr 08 2018

Status

approved