A298488 - OEIS

A298488

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

1, 7, 20, 41, 178, 388, 628, 1708, 2860, 4002, 9979, 17394, 15401, 63332, 135334, 82102, 702695, 2582167, 1191816, 17532272, 141444005, 38062610

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

OFFSET

1,2

COMMENTS

Diagonal of A298494.

LINKS

EXAMPLE

Some solutions for n=9

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

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

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

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

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 20 2018

STATUS

approved