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A261372 Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00001011 00010101 or 01010101. 1
36, 41, 202, 1040, 5633, 42302, 461576, 5441268, 87288274, 1757770516, 47269754142, 1497418790742, 65202132975489, 3410709440318090, 240487233522340499, 20318813275802198468, 2337266627779577763890 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A261380.

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..23

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A261380.

Sequence in context: A067372 A084147 A261258 * A044862 A162526 A078299

Adjacent sequences:  A261369 A261370 A261371 * A261373 A261374 A261375

KEYWORD

nonn

AUTHOR

R. H. Hardin, Aug 17 2015

STATUS

approved

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Last modified August 17 23:58 EDT 2017. Contains 290682 sequences.