A298224 Number of n X n 0..1 arrays with every element equal to 0, 1, 3, 4 or 5 king-move adjacent elements, with upper left element zero.

1, 4, 5, 195, 1749, 110320, 25406586, 7311722995, 11308912804354

Offset

1,2

Comments

Diagonal of A298230.

Links

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

Example

Some solutions for n=6
..0..0..1..1..0..0. .0..0..1..1..0..1. .0..1..1..0..1..0. .0..0..1..1..0..1
..1..1..1..1..1..1. .0..0..1..1..1..0. .1..1..0..1..1..1. .0..0..1..1..1..0
..1..1..0..0..1..1. .1..0..0..0..1..1. .1..0..0..0..1..0. .0..1..1..0..0..0
..0..1..0..0..0..1. .0..1..0..0..1..1. .1..0..0..1..1..0. .1..0..1..1..1..0
..1..1..1..0..1..1. .1..1..1..1..1..0. .1..1..0..1..0..0. .0..0..0..0..0..0
..0..1..1..1..1..0. .1..1..0..1..1..0. .1..1..1..0..0..1. .1..0..1..0..0..1

Crossrefs

Cf. A298230.

Sequence in context: A331578 A355705 A041745 * A051152 A042181 A368531

Adjacent sequences: A298221 A298222 A298223 * A298225 A298226 A298227

Keyword

nonn

Author

R. H. Hardin, Jan 15 2018

Status

approved