Search: id:A046053
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%I A046053
%S A046053 0,0,1,2,2,2,5,2,4,4,4,2,7,3,4,6,6,2,9,1,7,7,7,1,10,5,6,7,8,5,13,3,11,
               6,
%T A046053 6,7,12,3,3,6,11,4,15,4,11,10,6,2,13,4,10,8,9,4,14,8,12,6,8,2,20,7,5,
%U A046053 14,15,7,15,3,10,6,12,2,18,3,7,12,6,8,16,6,15,13,7,3,22,7,8,10,15,5
%N A046053 Total number of prime factors of the repunit R(n)=(10^n-1)/9.
%H A046053 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               Repunit.html">Link to a section of The World of Mathematics.</a>
%e A046053 R(6) = 111111 = (3) (7) (11) (13) (37), so a(6) = 5.
%Y A046053 Cf. A002275. For the number of distinct prime factors see A095370.
%Y A046053 Sequence in context: A113516 A120642 A095370 this_sequence A080348 A096396 
               A029662
%Y A046053 Adjacent sequences: A046050 A046051 A046052 this_sequence A046054 A046055 
               A046056
%K A046053 nonn
%O A046053 0,4
%A A046053 Eric Weisstein (eric(AT)weisstein.com)

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