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 A084863 Number of solutions to n = 2*u^2 + 3*v^2, u*v>0. 3
 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, 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, 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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,35 COMMENTS a(A084864(n)) > 0. LINKS Eric Weisstein's World of Mathematics, Diophantine Equation: 2nd Powers. EXAMPLE n=770 = 2*19^2 + 3*4^2 = 2*17^2 + 3*8^2 = 2*13^2 + 3*12^2 = 2*1 + 3*16^2, therefore a(770)=4. CROSSREFS Cf. A084865, A084866. Sequence in context: A188585 A294068 A181011 * A233441 A255365 A256505 Adjacent sequences:  A084860 A084861 A084862 * A084864 A084865 A084866 KEYWORD nonn AUTHOR Reinhard Zumkeller, Jun 10 2003 STATUS approved

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Last modified October 18 14:52 EDT 2019. Contains 328161 sequences. (Running on oeis4.)