Search: id:A019273
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%I A019273
%S A019273 1,3,35,245,11609,28379,171899,1043710445728,2197379769828
%N A019273 First run of n consecutive integers with same number of divisors ends 
               at a(n).
%C A019273 Terminating number in the sequence of consecutive integers with the same 
               number of divisors in A006558. - Jud McCranie (j.mccranie(AT)comcast.net), 
               Jan 14 2006
%D A019273 R. K. Guy "Unsolved Problems in Number Theory", section B18.
%D A019273 David Wells "Dictionary of Curious and Interesting Numbers" #40311.
%e A019273 phi(33)=phi(34)=phi(35), so a(3)=35
%Y A019273 Cf. A000005, A005237, A005238, A006601, A049051, A006558, A039665.
%Y A019273 a(n)=A006558(n)+n-1.
%Y A019273 Sequence in context: A133710 A130061 A061548 this_sequence A069448 A121078 
               A112488
%Y A019273 Adjacent sequences: A019270 A019271 A019272 this_sequence A019274 A019275 
               A019276
%K A019273 nonn
%O A019273 1,2
%A A019273 j.mccranie(AT)comcast.net (JUD MCCRANIE)
%E A019273 The entry 40315 given in Guy and Wells is incorrect.
%E A019273 More terms from Jud McCranie (JudMcCr(AT)BellSouth.net), Oct 04 2002
%E A019273 One more term from Jud McCranie (j.mccranie(AT)comcast.net), Jan 14 2006

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