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A259715 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011 0
32, 95, 568, 2059, 3120, 16294, 75200, 165976, 671824, 3555562, 11248808, 39460604, 210749488, 895687412, 3251082768, 16440249886, 84298558576 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A259723

LINKS

Table of n, a(n) for n=1..17.

EXAMPLE

Some solutions for n=4

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

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

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

..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0

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

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

CROSSREFS

Cf. A259723

Sequence in context: A188184 A126386 A208635 * A195088 A050429 A044219

Adjacent sequences:  A259712 A259713 A259714 * A259716 A259717 A259718

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 03 2015

STATUS

approved

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Last modified January 18 21:06 EST 2021. Contains 340262 sequences. (Running on oeis4.)