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A088839 Numerator of sigma[5n]/sigma[n]. For denominator see A088840. 0
7, 5, 7, 31, 7, 5, 7, 21, 7, 5, 7, 31, 7, 5, 7, 127, 7, 5, 7, 31, 7, 5, 7, 21, 7, 5, 7, 31, 7, 5, 7, 85, 7, 5, 7, 31, 7, 5, 7, 21, 7, 5, 7, 31, 7, 5, 7, 127, 7, 5, 7, 31, 7, 5, 7, 21, 7, 5, 7, 31, 7, 5, 7, 511, 7, 5, 7, 31, 7, 5, 7, 21, 7, 5, 7, 31, 7, 5, 7, 127, 7, 5, 7, 31, 7, 5, 7, 21, 7, 5, 7, 31 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

k=5; Table[Numerator[DivisorSigma[1, k*n]/DivisorSigma[1, n]], {n, 1, 128}]

CROSSREFS

Cf. A038712, A088837-A088840, A080278, A000203.

Sequence in context: A143297 A195348 A072449 * A111769 A111513 A198922

Adjacent sequences:  A088836 A088837 A088838 * A088840 A088841 A088842

KEYWORD

easy,nonn,frac

AUTHOR

Labos E. (labos(AT)ana.sote.hu), Nov 04 2003

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Last modified February 14 18:09 EST 2012. Contains 205663 sequences.