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A259993 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000101 0
48, 269, 2532, 12620, 55276, 760397, 4405472, 16728076, 252106808, 2271107674, 11377346280, 109672934102, 1249209797976, 12832413750726, 113080397436236, 943724463804782 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A260001

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A260001

Sequence in context: A205469 A115056 A001337 * A205747 A173121 A281234

Adjacent sequences:  A259990 A259991 A259992 * A259994 A259995 A259996

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 12 2015

STATUS

approved

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Last modified November 30 21:20 EST 2021. Contains 349426 sequences. (Running on oeis4.)