A302063 Number of n X n 0..1 arrays with every element equal to 0, 1, 2 or 4 horizontally or antidiagonally adjacent elements, with upper left element zero.

1, 8, 148, 7070, 807601, 230634314, 163660519064, 287524499258589, 1255489680741501583, 13604053305283669077460, 365895359118873240818539121, 24430548564295449443919121195475, 4049114247665544928116295437330272275

Offset

1,2

Comments

Diagonal of A302069.

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

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

Crossrefs

Cf. A302069.

Sequence in context: A218305 A244028 A075351 * A220559 A264642 A300872

Adjacent sequences: A302060 A302061 A302062 * A302064 A302065 A302066

Keyword

nonn

Author

R. H. Hardin, Mar 31 2018

Status

approved