A298088 - OEIS

A298088

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

0, 3, 15, 30, 45, 171, 229, 417, 822, 1359, 1993, 5049, 3669, 7878, 33158, 16734, 37752, 734240, 160344, 389218, 50665319, 1735920, 6661033

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OFFSET

1,2

COMMENTS

Diagonal of A298093.

LINKS

EXAMPLE

Some solutions for n=7

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

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

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 12 2018

STATUS

approved