Search: id:A081429
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%I A081429
%S A081429 138197,207227,621679,621883,633383,760079,829177,863711,898253,978863,
%T A081429 1035499,1036471,1209191,1451059,1566179,1658309,1658353,1761407,
%U A081429 1794229,1796503,1827479,1900147,2015303,2029439,2070997,2072893
%N A081429 Class 10- primes.
%D A081429 R. K. Guy, Unsolved Problems in Number Theory, A18.
%H A081429 R. J. Mathar, <a href="b081429.txt">Table of n, a(n) for n = 1..1188</
               a>
%t A081429 PrimeFactors[n_Integer] := Flatten[Table[ #[[1]], {1}] & /@ FactorInteger[n]]; 
               f[n_Integer] := Block[{m = n}, If[m == 0, m = 1, While[ IntegerQ[m/
               2], m /= 2]; While[ IntegerQ[m/3], m /= 3]]; Apply[Times, PrimeFactors[m] 
               - 1]]; ClassMinusNbr[n_] := Length[NestWhileList[f, n, UnsameQ, All]] 
               - 3; Prime[ Select[ Range[200000], ClassMinusNbr[ Prime[ # ]] == 
               10 &]]
%Y A081429 Cf. A005113, A056637, A005109, A005110, A005111, A005112, A081424, A081425, 
               A081426, A081427, A081428, A081430.
%Y A081429 Sequence in context: A025320 A025293 A025311 this_sequence A156844 A145207 
               A028518
%Y A081429 Adjacent sequences: A081426 A081427 A081428 this_sequence A081430 A081431 
               A081432
%K A081429 nonn
%O A081429 1,1
%A A081429 Robert G. Wilson v (rgwv(AT)rgwv.com), Mar 20 2003

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