A300308 - OEIS

A300308

Number of n X n 0..1 arrays with every element equal to 0, 1, 2, 4, 5, 6, 7 or 8 king-move adjacent elements, with upper left element zero.

1, 7, 20, 211, 15171, 1676663, 543024998, 558233828840, 1538341448830389

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

OFFSET

1,2

COMMENTS

Diagonal of A300314.

LINKS

EXAMPLE

Some solutions for n=5

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Mar 02 2018

STATUS

approved