Search: id:A123929
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%I A123929
%S A123929 3,5,8,13,17,22,28,31,38,43,47,53,59,67,73,77,82,89,97,101,107,113,121,
%T A123929 127,133,139,148,151,158,163,167,179,191,197,203,209,218,227,233,241,
%U A123929 251,257,262,269,274,281,284,293,307,313,317,322,332,343,347,353,361
%N A123929 Simili-primes of order 2.
%C A123929 Start examining the natural numbers from 2 on and call an "atom" the 
               first integer which cannot be divided by another "atom"; this sieve 
               produces the prime numbers. Here we call "atom" the second integer 
               which cannot be divided by another "atom" - thus the sequence starts 
               with 3 (not 2) and continues with 5 (not 4), then 8 (not 6 or 7), 
               then 13, etc.
%C A123929 Terms computed by Mensanator.
%D A123929 J.-P. Delahaye, Inventiones \`{a} suivre, Pour la Science, No. 353, 2007, 
               to appear.
%H A123929 Mensanator, <a href="b123929.txt">Table of n, a(n) for n = 1..150</a>
%H A123929 Eric Angelini, <a href="http://www.cetteadressecomportecinquantesignes.com/
               ThousandZetas.htm">Thousand Zetas</a>
%H A123929 Eric Angelini, <a href="a123929.html">Thousand Zetas</a>
%F A123929 Conjecture : a(n) is asymptotic to c*n*log(n) with c about 1.5. - Benoit 
               Cloitre (benoit7848c(AT)orange.fr), Feb 11 2007
%Y A123929 Cf. A126618-A126624.
%Y A123929 Sequence in context: A092360 A129141 A097431 this_sequence A036715 A158384 
               A053651
%Y A123929 Adjacent sequences: A123926 A123927 A123928 this_sequence A123930 A123931 
               A123932
%K A123929 easy,nonn
%O A123929 1,1
%A A123929 Eric Angelini and Hugo van der Sanden (eric.angelini(AT)kntv.be), Nov 
               22 2006

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