A298713 - OEIS

A298713

Number of n X n 0..1 arrays with every element equal to 2, 3, 4, 6 or 7 king-move adjacent elements, with upper left element zero.

0, 1, 4, 59, 3508, 563977, 193439202, 177476979652, 405759343397572

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OFFSET

1,3

COMMENTS

Diagonal of A298719.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 25 2018

STATUS

approved