A299603 - OEIS

A299603

Number of n X n 0..1 arrays with every element equal to 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

0, 4, 48, 466, 5125, 75970, 1284100, 30465069, 1069988410, 50612692651, 3442371498953

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,2

COMMENTS

Diagonal of A299607.

LINKS

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 14 2018

STATUS

approved