Search: id:A141218
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%I A141218
%S A141218 1,6,6,8,12,12,18,16,12,18,24,24,30,24,24,36,24,36,36,24,40,48,36,36,54,
%T A141218 48,48,54,60,48,66,48,48,60,64,72,54,60,72,72,84,72,90,72,48,72,90,96,
%U A141218 88,90,72,108,80,108,80,108,96,72,120,108,96,126,112,120,108,96,132,120
%N A141218 Nonprimes of the form ((p(max)-1)*..*p*(p(min)+1)), where a(0)=1 and 
               (p(max))*..*p*(p(min)=k(n)=n-th nonprime.
%e A141218 If k(1)=4=(p(max)=2)*(p(min)=2), then (2-1)*(2+1)=1*3=3
%e A141218 (prime).
%e A141218 If k(2)=6=(p(max)=3)*(p(min)=2), then
%e A141218 (3-1)*(2+1)=2*3=6 (nonprime)=a(1).
%e A141218 If k(3)=8=(p(max)=2)*(p=2)*(p(min)=2), then
%e A141218 (2-1)*2*(2+1)=1*2*3=6 (nonprime)=a(2), etc.
%Y A141218 Sequence in context: A088684 A088683 A000509 this_sequence A160257 A083507 
               A157320
%Y A141218 Adjacent sequences: A141215 A141216 A141217 this_sequence A141219 A141220 
               A141221
%K A141218 nonn
%O A141218 1,2
%A A141218 Juri-Stepan Gerasimov (2stepan(AT)rambler.ru) Aug 7 2008
%E A141218 a(27), a(41), a(53) corrected by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), 
               Aug 18 2008

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