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A103504 Integers that do not appear in A103502. 2

%I #13 Sep 23 2014 14:27:37

%S 123,1298,4929,9516,10066,14192,15830,15887,17854,20007,23394,24574,

%T 27441,31932,33377,33381,33933,35594,35978,37075,40139,40931,41205,

%U 43573,45147,47661,47749,48286,48444,48941,50580,51659,52377,59375,61260,61726,62465,63063

%N Integers that do not appear in A103502.

%C For n>1873, A103502(n)>123 and for n>27763, A103502(n)>1298. - _Michel Marcus_, Feb 06 2014

%H Hiroaki Yamanouchi, <a href="/A103504/b103504.txt">Table of n, a(n) for n = 1..3804</a>

%t Restop = Function[n, pp = Prime[Range[PrimePi[n]]]; Sum[n/pp[[k]] - Floor[n/pp[[k]]], {k, 1, Length[pp]}]]; oops = Floor[Map[Restop, Range[1, 30000]]]; Complement[Range[Max[oops]], Union[oops]]

%t f[n_] := Floor[Plus @@ FractionalPart[n / Table[ Prime[i], {i, PrimePi[n]}]]]; Do[ a = f[n]; If[ Position[t, a] == {}, AppendTo[t, a]], {n, 81900}]; Complement[ Range[ Sort[t][[ -1]]], t] (* _Robert G. Wilson v_, Feb 12 2005 *)

%Y Cf. A103502.

%K nonn

%O 1,1

%A _Carlos Alves_, Feb 08 2005

%E a(3)-a(38) from _Hiroaki Yamanouchi_, Sep 23 2014

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Last modified April 25 09:56 EDT 2024. Contains 371967 sequences. (Running on oeis4.)