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%I #5 Feb 09 2017 12:36:44
%S 0,0,0,0,1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1,1,0,0,0,0,0,0,0,1,1,0,0,0,0,
%T 2,0,0,0,0,0,0,0,0,1,1,0,0,0,0,1,0,0,1,0,0,1,0,0,1,0,0,1,0,0,0,1,0,0,
%U 0,0,0,0,0,0,1,0,2,0,0,1,0,0,1,1,0,0,0,0,0,0,0,0,1,0,0,0,0,1,1,0,1,0
%N Number of solutions to n = 2*u^2 + 3*v^2, u*v>0.
%C a(A084864(n)) > 0.
%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/DiophantineEquation2ndPowers.html">Diophantine Equation: 2nd Powers.</a>
%e n=770 = 2*19^2 + 3*4^2 = 2*17^2 + 3*8^2 = 2*13^2 + 3*12^2 = 2*1 +
%e 3*16^2, therefore a(770)=4.
%Y Cf. A084865, A084866.
%K nonn
%O 1,35
%A _Reinhard Zumkeller_, Jun 10 2003