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A260240 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000101 or 00001001 0
48, 213, 1476, 5733, 38280, 416911, 1606456, 7479479, 103497076, 746247122, 2383760912, 25616797423, 351265905756, 1400540744283 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A260248

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A260248

Sequence in context: A260098 A260286 A183683 * A260062 A235759 A062248

Adjacent sequences:  A260237 A260238 A260239 * A260241 A260242 A260243

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 20 2015

STATUS

approved

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Last modified December 6 16:12 EST 2021. Contains 349565 sequences. (Running on oeis4.)