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%I #14 Sep 12 2019 09:25:32
%S 11,20,32,48,68,93,124,162,209,266,334,415,513,628,764,922,1108,1325,
%T 1574,1858,2186,2562,2992,3480,4038,4670,5379,6184,7094,8115,9263,
%U 10552,11991,13600,15400,17403,19629,22107,24856,27902,31275,35008
%N a(n+1) = a(n)-th composite number, with a(1) = 11.
%H Chai Wah Wu, <a href="/A059407/b059407.txt">Table of n, a(n) for n = 1..900</a>
%t g[ n_Integer ] := (k = n + PrimePi[ n ] + 1; While[ k - PrimePi[ k ] - 1, k++ ]; k); NestList[ g, 11, 45 ]
%t Module[{c=Select[Range[500000],CompositeQ]},NestList[c[[#]]&,11,50]] (* Requires Mathematica version 10 or later *) (* _Harvey P. Dale_, Sep 12 2019 *)
%o (PARI) lista(nn) = {print1(a = 11, ", "); nb = 0; forcomposite(c=1, nn, nb++; if (nb==a, print1(c, ", "); a = c););} \\ _Michel Marcus_, May 14 2018
%Y Cf. A006508, A059408.
%K nonn
%O 1,1
%A _Robert G. Wilson v_, Jan 29 2001
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