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Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111
0

%I #4 Jul 23 2015 13:08:35

%S 48,127,912,4633,6144,38370,265120,551542,2092680,17786146,60491904,

%T 183202732,1313066840,6986822950,25056637336,145821754612

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001111

%C Diagonal of A260370

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A260370

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 23 2015