%I #5 Oct 27 2019 21:44:29

%S 1,568504,23041655136,64008728200384,20331541618406216,

%T 1051966701961097184,13952451706754445456

%N Number of 13 X 13 arrays of squares of integers, symmetric about main diagonal, with all rows summing to n.

%K nonn

%O 0,2

%A _R. H. Hardin_, Feb 09 2009