A066958 - OEIS

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A066958

Number of ordered primitive solutions (x,y,z) to xy + yz + zx = n with x,y,z >= 1.

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

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OFFSET

1,5

LINKS

T. D. Noe, Table of n, a(n) for n=1..1000

CROSSREFS

Cf. A066851.

Sequence in context: A318050 A053604 A375064 * A357062 A066851 A288571

Adjacent sequences: A066955 A066956 A066957 * A066959 A066960 A066961

KEYWORD

nonn,easy

AUTHOR

Colin Mallows, Jan 26 2002

EXTENSIONS

More terms from Vladeta Jovovic, Apr 14 2002

STATUS

approved