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A088840 Denominator of quotient=sigma(5n)/sigma(n). 3
1, 1, 1, 7, 1, 1, 1, 5, 1, 1, 1, 7, 1, 1, 1, 31, 1, 1, 1, 7, 1, 1, 1, 5, 1, 1, 1, 7, 1, 1, 1, 21, 1, 1, 1, 7, 1, 1, 1, 5, 1, 1, 1, 7, 1, 1, 1, 31, 1, 1, 1, 7, 1, 1, 1, 5, 1, 1, 1, 7, 1, 1, 1, 127, 1, 1, 1, 7, 1, 1, 1, 5, 1, 1, 1, 7, 1, 1, 1, 31, 1, 1, 1, 7, 1, 1, 1, 5, 1, 1, 1, 7, 1, 1, 1, 21, 1, 1, 1, 7, 1, 1 (list; graph; refs; listen; history; internal format)
OFFSET

1,4

MATHEMATICA

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

CROSSREFS

Cf. A088837-A088841, A038712, A080278, A000203.

Sequence in context: A174544 A168423 A072101 * A165725 A178637 A115064

Adjacent sequences:  A088837 A088838 A088839 * A088841 A088842 A088843

KEYWORD

easy,nonn,mult,frac

AUTHOR

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

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Last modified February 15 20:03 EST 2012. Contains 205852 sequences.