A260536 - OEIS

A260536

Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00010001

40, 131, 774, 2775, 9184, 50674, 219852, 991164, 6265304, 31978322, 161993488, 1205560940, 7787001888, 46339128440, 362482299512, 2995644789618

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

OFFSET

1,1

COMMENTS

Diagonal of A260544

LINKS

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 28 2015

STATUS

approved