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A088838 Numerator of quotient=sigma[3n]/sigma[n]. Denominator see in A080278. 1
4, 4, 13, 4, 4, 13, 4, 4, 40, 4, 4, 13, 4, 4, 13, 4, 4, 40, 4, 4, 13, 4, 4, 13, 4, 4, 121, 4, 4, 13, 4, 4, 13, 4, 4, 40, 4, 4, 13, 4, 4, 13, 4, 4, 40, 4, 4, 13, 4, 4, 13, 4, 4, 121, 4, 4, 13, 4, 4, 13, 4, 4, 40, 4, 4, 13, 4, 4, 13, 4, 4, 40, 4, 4, 13, 4, 4, 13, 4, 4, 364, 4, 4, 13, 4, 4, 13, 4, 4, 40 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

k=3; Table[Numerator[DivisorSigma[1, k*n]/DivisorSigma[1, n]], {n, 1, 128}]

CROSSREFS

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

Sequence in context: A106232 A038804 A183362 * A127403 A052993 A005301

Adjacent sequences:  A088835 A088836 A088837 * A088839 A088840 A088841

KEYWORD

easy,nonn

AUTHOR

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

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Last modified February 16 06:46 EST 2012. Contains 205867 sequences.