A301348 Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 5 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 3, 53, 2349, 264054, 78012336, 59990521481, 119913579672155, 622564600937446253, 8402046535849070738107

Offset

1,2

Comments

Diagonal of A301354.

Links

Table of n, a(n) for n=1..10.

Example

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

Crossrefs

Cf. A301354.

Sequence in context: A296678 A227051 A300606 * A296680 A118194 A325725

Adjacent sequences: A301345 A301346 A301347 * A301349 A301350 A301351

Keyword

nonn

Author

R. H. Hardin, Mar 19 2018

Status

approved