A300606 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

0, 3, 53, 2347, 263468, 77669371, 59556673490, 118646962163280, 613557423442676836, 8242700694825663880442

Offset

1,2

Comments

Diagonal of A300612.

Links

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

Example

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

Crossrefs

Cf. A300612.

Sequence in context: A300683 A296678 A227051 * A301348 A296680 A118194

Adjacent sequences: A300603 A300604 A300605 * A300607 A300608 A300609

Keyword

nonn

Author

R. H. Hardin, Mar 09 2018

Status

approved