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%I #10 Sep 05 2017 06:48:06
%S 2993,63254,63792,82213,104728,130811,135767,137994,149813,156335,
%T 193041,193776,199879,210805,211672,223315,251970,260321,262337,
%U 272797,275037,282223,286055,287700,288132,290011,305784,308918,320597,324168,346165,347376,361103,372074,381698
%N Numbers n such that A160691(n)=12.
%C What is the first number n such that A160691(n) is not in the set {1,2,4,6,8,12}?
%C 271532 is the first such number and A160691(271532)=10. - _Michel Marcus_, Sep 05 2017
%t c[1]=1;c[n_]:=c[n]=(s=Sum[c[k],{k,n-1}];For[m=1,DivisorSigma[0,m]!=
%t DivisorSigma[0,s+m],m++ ];m);Do[If[DivisorSigma[0,c[n]]==12,Print[n]],{n,210000}]
%Y Cf. A158964, A160689, A160690, A160691.
%K nonn
%O 1,1
%A _Farideh Firoozbakht_, May 28 2009
%E More terms from _Michel Marcus_, Sep 05 2017
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