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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
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
Sequence in context: A294068 A339553 A181011 * A368072 A233441 A255365
KEYWORD
nonn
AUTHOR
Reinhard Zumkeller, Jun 10 2003
STATUS
approved