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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

Table of n, a(n) for n=1..102.

Eric Weisstein's World of Mathematics, Diopha ntine 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: A004530 A188585 A181011 * A073346 A114099 A028613

Adjacent sequences:  A084860 A084861 A084862 * A084864 A084865 A084866

KEYWORD

nonn

AUTHOR

Reinhard Zumkeller, Jun 10 2003

STATUS

approved

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Last modified May 22 17:33 EDT 2013. Contains 225559 sequences.