A304012 - OEIS

A304012

Number of n X n 0..1 arrays with every element unequal to 1, 2, 3 or 5 king-move adjacent elements, with upper left element zero.

0, 7, 38, 370, 5162, 99733, 2820436, 106817959, 5516875986, 403632644584

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OFFSET

1,2

COMMENTS

Diagonal of A304019.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, May 04 2018

STATUS

approved