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Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101
0

%I #4 Aug 06 2015 11:11:20

%S 48,133,372,1513,4592,18706,45504,195280,441072,2093846,4057280,

%T 20962048,38827984,225849174,367470344,2376475916,3621888816,

%U 26598528246,37810953848,300880005340,400697050360

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00001001 or 00100101

%C Diagonal of A260980

%e Some solutions for n=4

%e ..0..0..0..1..0..0....0..1..0..0..0..0....1..0..0..0..0..0....1..0..0..0..1..0

%e ..0..0..1..0..0..1....0..0..0..0..0..0....0..1..0..0..0..1....0..0..0..0..0..0

%e ..0..0..0..0..1..0....1..0..0..0..1..0....0..0..0..1..0..0....0..1..0..0..0..0

%e ..0..0..0..0..0..0....0..0..1..0..0..1....0..0..1..0..0..0....1..0..0..1..0..0

%e ..0..1..0..0..0..0....1..0..0..1..0..0....0..0..0..0..1..0....0..0..1..0..0..0

%e ..1..0..0..1..0..0....0..1..0..0..0..1....0..0..0..1..0..0....1..0..0..0..1..0

%Y Cf. A260980

%K nonn

%O 1,1

%A _R. H. Hardin_, Aug 06 2015