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A066958
Number of ordered primitive solutions (x,y,z) to xy + yz + zx = n with x,y,z >= 1.
4
0, 0, 1, 0, 3, 0, 3, 3, 3, 0, 9, 0, 3, 6, 6, 3, 9, 0, 9, 6, 6, 0, 15, 6, 3, 12, 9, 0, 15, 0, 15, 9, 6, 6, 18, 6, 3, 12, 18, 6, 21, 0, 9, 12, 6, 6, 27, 6, 9, 12, 18, 6, 15, 12, 18, 18, 6, 0, 33, 0, 15, 18, 18, 9, 18, 12, 9, 18, 18, 0, 39, 6, 9, 24, 18, 12, 18, 0, 27, 18, 15, 6, 33, 12, 6, 24, 30
OFFSET
1,5
CROSSREFS
Cf. A066851.
Sequence in context: A318050 A053604 A375064 * A357062 A066851 A288571
KEYWORD
nonn,easy
AUTHOR
Colin Mallows, Jan 26 2002
EXTENSIONS
More terms from Vladeta Jovovic, Apr 14 2002
STATUS
approved