A255074 - OEIS

%I #5 Feb 14 2015 10:15:55

%S 208,2704,103929,4906225,442721280,87959696400,29652533456379,

%T 18203258527980304,22357815257396827080,49610361490350558051961,

%U 199432453303213933029482554,1523887036252507934951348001529

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

%C Diagonal of A255082

%H R. H. Hardin, <a href="/A255074/b255074.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A255082

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 14 2015