A303107 Number of 7Xn 0..1 arrays with every element equal to 1, 2, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 1172, 102952, 5550469, 436394066, 32409609245, 2441756629583, 183384084351689, 13794436866124300, 1037425601212697006, 78023920445683729803, 5868131456816299629031, 441338827948853709668453

Offset

1,2

Comments

Row 7 of A303102.

Links

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

Example

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

Crossrefs

Cf. A303102.

Sequence in context: A303258 A230738 A302386 * A302958 A232082 A187725

Adjacent sequences: A303104 A303105 A303106 * A303108 A303109 A303110

Keyword

nonn

Author

R. H. Hardin, Apr 18 2018

Status

approved