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A260062 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00000111 0
48, 214, 1680, 7725, 25444, 251582, 1838884, 7478945, 76589120, 1223125268, 8125786040, 53795046102, 1356397478832, 26105639799058, 186181935816048, 2661981784951575 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A260070

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Cf. A260070

Sequence in context: A260286 A183683 A260240 * A235759 A062248 A100146

Adjacent sequences:  A260059 A260060 A260061 * A260063 A260064 A260065

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 14 2015

STATUS

approved

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Last modified February 20 06:26 EST 2019. Contains 320332 sequences. (Running on oeis4.)