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A261284
Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00010101 or 01010101.
1
36, 77, 271, 1147, 6996, 51268, 561724, 6295926, 107865659, 2065840014, 57883274521, 1752577624054, 80161163488540, 3993898268151118, 295206710031036849, 23800415351857927140, 2870471520849798820514
OFFSET
1,1
COMMENTS
Diagonal of A261292.
LINKS
EXAMPLE
Some solutions for n=4
..1..0..0..0..1..0....1..0..1..0..1..0....0..0..0..0..1..0....1..0..1..0..1..0
..0..1..0..1..0..1....0..1..0..1..0..1....0..0..0..0..0..1....0..1..0..1..0..1
..1..0..1..0..1..0....1..0..0..0..1..0....0..0..1..0..1..0....1..0..1..0..1..0
..0..1..0..1..0..1....0..1..0..1..0..0....0..0..0..1..0..1....0..1..0..1..0..1
..1..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..1..0....1..0..1..0..1..0
..0..1..0..1..0..1....0..1..0..0..0..0....0..1..0..1..0..1....0..1..0..0..0..1
CROSSREFS
Cf. A261292.
Sequence in context: A262796 A255101 A255094 * A111163 A286430 A279901
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 14 2015
STATUS
approved