%I A050680
%S A050680 5,10,12,13,31,38,43,49,51,55,59,60
%N A050680 Positions of 3's in A050677.
%D A050680 M. Fleuren, Smarandache Factors and Reverse Factors, Smarandache Notions 
               Journal, 10 (No. 1-2-3, Spring 1999), 5-38.
%H A050680 P. De Geest, <a href="http://www.worldofnumbers.com/revfact.htm">Reversed 
               Smarandache Concatenated Numbers, Prime factors from n down to 1</
               a>
%H A050680 M. L. Perez et al., eds., <a href="http://www.gallup.unm.edu/~smarandache/
               ">Smarandache Notions Journal</a>
%H A050680 C. Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_008.htm">
               Primes by Listing</a>
%H A050680 M. Fleuren, <a href="http://www.gallup.unm.edu/~smarandache/michafleuren.htm">
               Factors and primes of Smarandache sequences</a>.
%H A050680 M. Fleuren, <a href="http://www.gallup.unm.edu/~smarandache/micha.txt">
               Smarandache Factors and Reverse factors</a>
%Y A050680 Cf. A000422, A050677, A046462.
%Y A050680 Sequence in context: A007527 A033894 A033649 this_sequence A098670 A162821 
               A059324
%Y A050680 Adjacent sequences: A050677 A050678 A050679 this_sequence A050681 A050682 
               A050683
%K A050680 nonn,base,hard
%O A050680 0,1
%A A050680 Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.