%I #24 Nov 10 2018 08:59:33
%S 1,0,0,0,0,1,0,0,0,0,1,0,0,1,0,1,0,1,1,0,1,0,1,1,0,2,1,1,1,1,3,1,1,1,
%T 2,3,1,2,2,3,3,2,4,3,3,4,3,5,3,3,6,5,6,4,6,8,6,6,7,8,9,7,8,10,10,12,
%U 10,12,13,11,15,15,14,15,14,20,19,16,21,20,25,22,22,27
%N Expansion of Product_{0 < i < j} (1 + x^(i^2 + j^2)).
%F G.f.: Product_{k>0} (1 + x^k)^A025441(k).
%Y Cf. A025441, A321435, A320332, A321444, A321445.
%K nonn
%O 0,26
%A _Seiichi Manyama_, Nov 09 2018