A300611 Number of nX7 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

8, 981, 39330, 1387896, 48279880, 1693172810, 59556673490, 2093683166397, 73570793306416, 2585342220762941, 90853207535884062, 3192739038133777424, 112198275062067123972, 3942836730456260003891, 138557934963625655483146

Offset

1,1

Comments

Column 7 of A300612.

Links

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

Example

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

Crossrefs

Cf. A300612.

Sequence in context: A331491 A300426 A300688 * A301353 A183888 A181965

Adjacent sequences: A300608 A300609 A300610 * A300612 A300613 A300614

Keyword

nonn

Author

R. H. Hardin, Mar 09 2018

Status

approved