Search: id:A136611
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%I A136611
%S A136611 0,1,2,3,1024,6,56,9,100000000000,19216339899072,210,16,
%T A136611 266314164608823014829171,20,462,552,25
%N A136611 (0, 1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3,..) becomes (0, 
               1, 2, 3, 4^5, 6, 7*8, 9, 10^11, 12^13, 14*15, 16, 17^18*19,..).
%e A136611 a(5)=4^5=1024.
%e A136611 a(7)=7*8=56.
%e A136611 a(9)=10^11=100000000000.
%e A136611 a(10)=12^13=19216339899072.
%e A136611 a(11)=14*15=210.
%e A136611 a(12)=17^18*19=266314164608823014829171,
%e A136611 etc.
%Y A136611 Cf. A141269, A141270.
%Y A136611 Sequence in context: A108332 A066685 A076155 this_sequence A004898 A062920 
               A036111
%Y A136611 Adjacent sequences: A136608 A136609 A136610 this_sequence A136612 A136613 
               A136614
%K A136611 nonn
%O A136611 1,3
%A A136611 Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Nov 08 2008

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