A298771 - OEIS

A298771

Number of n X n 0..1 arrays with every element equal to 1, 2, 4, 5 or 8 king-move adjacent elements, with upper left element zero.

0, 3, 15, 78, 682, 11320, 484813, 22160831, 2093453587, 397340932476

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

OFFSET

1,2

COMMENTS

Diagonal of A298775.

LINKS

EXAMPLE

Some solutions for n=6

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

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 26 2018

STATUS

approved