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Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 and no column sum 0
0

%I #4 Mar 06 2015 11:33:42

%S 140,1743,58729,2413487,193188995,32105186518,9007582907953,

%T 4590560094334298,4477200560643502537,7835100506995593159086

%N Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 and no column sum 0

%C Diagonal of A255783

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A255783

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 06 2015