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A077089
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Quotients when sigma[n+1]/sigma[n] is integer.
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0
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3, 2, 1, 2, 1, 1, 2, 1, 1, 1, 2, 3, 1, 3, 1, 2, 1, 2, 2, 3, 2, 1, 1, 1, 1, 1, 3, 1, 1, 1, 2, 2, 2, 2, 3, 1, 2, 2, 3, 2, 2, 1, 2, 1, 2, 1, 1, 1, 1, 2, 3, 2, 2, 1, 2, 2, 1, 2, 3, 3, 1, 3, 1, 2, 2, 2, 3, 2, 1, 1, 3, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 2, 1, 3, 3, 2, 1, 2, 1, 2, 2, 3, 1, 2, 2, 1, 2, 2, 1, 1, 1, 1, 1, 1, 1
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| n=1: sigma[2]/sigma[1]=3/1=3=a(1); n=14: sigma[15]/sigma[14]=24/24=1=a(2); n=5: sigma[6]/1igma[5]=12/6=2=a(3).
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MATHEMATICA
| Do[s=Mod[a=DivisorSigma[1, n+1], b=DivisorSigma[1, n]]; If[Equal[s, 0], Print[a/b]], {n, 1, 10000000}]
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CROSSREFS
| Cf. A000203, A002961, A067081, A077086, A077087.
Sequence in context: A137241 A016457 A181715 * A156352 A175191 A096248
Adjacent sequences: A077086 A077087 A077088 * A077090 A077091 A077092
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Oct 31 2002
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