A303034 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

1, 3, 14, 74, 703, 13597, 345668, 13840842, 1107624272, 184266124741

Offset

1,2

Comments

Diagonal of A303040.

Links

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

Example

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

Crossrefs

Cf. A303040.

Sequence in context: A074549 A245246 A126122 * A026004 A200718 A063016

Adjacent sequences: A303031 A303032 A303033 * A303035 A303036 A303037

Keyword

nonn

Author

R. H. Hardin, Apr 17 2018

Status

approved