A302466 Number of n X n 0..1 arrays with every element equal to 1, 2, 3 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 3, 49, 1401, 101109, 16983273, 6145486847, 5300304476103, 10112328688586133

Offset

1,2

Comments

Diagonal of A302472.

Links

Table of n, a(n) for n=1..9.

Example

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

Crossrefs

Cf. A302472.

Sequence in context: A202534 A277497 A173174 * A303248 A369942 A187664

Adjacent sequences: A302463 A302464 A302465 * A302467 A302468 A302469

Keyword

nonn

Author

R. H. Hardin, Apr 08 2018

Status

approved