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A260286 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001 0
48, 201, 1336, 5629, 10952, 72652, 385280, 1076482, 6847376, 52370322, 193796536, 1164631962, 12219797584, 66126528758, 352038007240, 4424875060216 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A260294

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

CROSSREFS

Cf. A260294

Sequence in context: A072254 A290350 A260098 * A183683 A260240 A260062

Adjacent sequences:  A260283 A260284 A260285 * A260287 A260288 A260289

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jul 22 2015

STATUS

approved

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Last modified January 24 13:09 EST 2022. Contains 350538 sequences. (Running on oeis4.)