A298958 - OEIS

A298958

Number of n X n 0..1 arrays with every element equal to 3, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 1, 1, 7, 31, 360, 4263, 101720, 3172536, 169440015, 12802881385, 1552491730921

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OFFSET

1,4

COMMENTS

Diagonal of A298963.

LINKS

EXAMPLE

Some solutions for n=5

..0..0..1..1..1. .0..0..0..1..1. .0..0..0..0..0. .0..0..0..1..1

..1..1..1..1..1. .0..0..0..0..0. .0..0..0..0..0. .0..0..0..1..1

..1..1..1..0..0. .1..1..0..0..0. .1..1..1..0..0. .1..1..0..0..0

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 30 2018

STATUS

approved