Search: id:A077017
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%I A077017
%S A077017 2,2,6,10,14,22,26,34,38,46,58,62,74,82,86,94,106,118,122,134,142,146,
%T A077017 158,166,178,194,202,206,214,218,226,254,262,274,278,298,302,314,326,
%U A077017 334,346,358,362,382,386,394,398,422,446,454,458,466,478,482,502,514
%N A077017 a(1) = 2, a(n+1) = smallest positive integer divisible by the n-th prime 
               that also has a nontrivial common divisor with a(n).
%C A077017 Each term of the sequence is a solution of the equation sigma(x)=3*(x-phi(x)) 
               (*) - the proof is easy. Does there exist a solution of (*) which 
               is not in the sequence? - Farideh Firoozbakht (mymontain(AT)yahoo.com), 
               Apr 22 2006
%F A077017 a(n) = 2*prime(n) for n>2.
%F A077017 a(n)=2*prime(n-1) for n>2. - Farideh Firoozbakht (mymontain(AT)yahoo.com), 
               Apr 22 2006
%Y A077017 Sequence in context: A077063 A081728 A080460 this_sequence A127404 A165941 
               A054227
%Y A077017 Adjacent sequences: A077014 A077015 A077016 this_sequence A077018 A077019 
               A077020
%K A077017 nonn,easy
%O A077017 1,1
%A A077017 Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Oct 28 2002
%E A077017 Corrected and extended by Dean Hickerson (dean.hickerson(AT)yahoo.com), 
               Jan 28 2003

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