A119612 Number of integers of the form (nk)^3/(n^3+k^3), k>=1.

0, 1, 1, 1, 0, 3, 0, 1, 1, 1, 0, 3, 0, 2, 1, 1, 0, 3, 0, 1, 1, 1, 0, 3, 0, 1, 1, 2, 0, 3, 0, 1, 1, 1, 0, 3, 0, 1, 1, 1, 0, 6, 0, 1, 1, 1, 0, 3, 0, 1, 1, 1, 0, 3, 0, 2, 2, 1, 0, 3, 0, 1, 1, 1, 1, 3, 0, 1, 1, 3, 0, 3, 0, 1, 1, 1, 0, 4, 0, 1, 1, 1, 0, 7, 0, 2, 1, 1, 0, 3, 0, 1, 1, 1, 0, 3, 0, 2, 1, 1, 0

Offset

0,6

Links

Table of n, a(n) for n=0..100.

Example

n=14 k=42 (14^3 * 42^3)/(14^3 + 42^3)= (2744 * 74088)/(2744 + 74088) = 203297472 / 76832 = 2646

Crossrefs

Cf. A071086.

Sequence in context: A119624 A213727 A367452 * A101949 A124796 A343858

Adjacent sequences: A119609 A119610 A119611 * A119613 A119614 A119615

Keyword

easy,nonn

Author

Paolo P. Lava and Giorgio Balzarotti, Jun 05 2006

Status

approved