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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 00001001
0

%I #4 Jul 22 2015 11:44:28

%S 48,201,1336,5629,10952,72652,385280,1076482,6847376,52370322,

%T 193796536,1164631962,12219797584,66126528758,352038007240,

%U 4424875060216

%N Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001001

%C Diagonal of A260294

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A260294

%K nonn

%O 1,1

%A _R. H. Hardin_, Jul 22 2015