%I A156393
%S A156393 1,0,0,0,4,0,0,1,0,0,0,0,0,0,0,0,7,0,0,0,0,0,0,0,6,0,0,0,1,0,0,0,0,0,0,
               0,
%T A156393 14,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,0,0,0,0,0,0,5,13,0,0,0,42,
               0,
%U A156393 0,0,0,0,0,0,0,0,0,6,0,0,0,0,0,0,0,4,18,0,0,0,0,0,0,6,6,0,0,0
%N A156393 Number of 7X7 arrays of squares of integers, symmetric about the diagonal 
               and under 90 degree rotation, with all rows summing to n.
%e A156393 All solutions for n=4
%e A156393 ...0.1.1.0.1.1.0...0.1.1.0.1.1.0...1.0.1.0.1.0.1...1.1.0.0.0.1.1
%e A156393 ...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0...1.0.1.0.1.0.1
%e A156393 ...1.1.0.0.0.1.1...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0
%e A156393 ...0.0.0.4.0.0.0...0.0.0.4.0.0.0...0.0.0.4.0.0.0...0.0.0.4.0.0.0
%e A156393 ...1.1.0.0.0.1.1...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0
%e A156393 ...1.0.1.0.1.0.1...1.1.0.0.0.1.1...0.1.1.0.1.1.0...1.0.1.0.1.0.1
%e A156393 ...0.1.1.0.1.1.0...0.1.1.0.1.1.0...1.0.1.0.1.0.1...1.1.0.0.0.1.1
%Y A156393 Sequence in context: A099306 A101193 A013334 this_sequence A096623 A152889 
               A151905
%Y A156393 Adjacent sequences: A156390 A156391 A156392 this_sequence A156394 A156395 
               A156396
%K A156393 nonn
%O A156393 0,5
%A A156393 Ron Hardin (rhhardin(AT)att.net) Feb 09 2009