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A158963
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Numbers n such that A160691(n)=12.
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2
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2993, 63254, 63792, 82213, 104728, 130811, 135767, 137994, 149813, 156335, 193041, 193776, 199879
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| What is the first number n such that A160691(n) is not in the set {1,2,6,8,12}?
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MATHEMATICA
| c[1]=1; c[n_]:=c[n]=(s=Sum[c[k], {k, n-1}]; For[m=1, DivisorSigma[0, m]!=
DivisorSigma[0, s+m], m++ ]; m); Do[If[DivisorSigma[0, c[n]]==12, Print[n]], {n, 210000}]
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CROSSREFS
| Cf. A158964, A160689, A160690, A160691.
Sequence in context: A108926 A159731 A205241 * A178326 A063055 A031130
Adjacent sequences: A158960 A158961 A158962 * A158964 A158965 A158966
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KEYWORD
| more,nonn
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AUTHOR
| Farideh Firoozbakht (mymontain(AT)yahoo.com), May 28 2009
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