%I A064841
%S A064841 1,10,11,1010,101,1011,111,101010,1111,10101,1011,101011,1101,10111,
%T A064841 11101,10101010,10001,101111,10011,1010101,11111,101011,10111,10101011,
%U A064841 101101,101101,111111,1010111,11101,1011101,11111,1010101010,111011
%N A064841 Working in base 2, replace n by the concatenation of its prime divisors 
               in increasing order.
%H A064841 P. De Geest, <a href="http://www.worldofnumbers.com/topic1.htm">Home 
               Primes</a>
%e A064841 15 = 3*5 -> 11.101 -> 11101, so a(15) = 11101.
%Y A064841 See A048985 for same terms written in base 10.
%Y A064841 Sequence in context: A041218 A041917 A109280 this_sequence A064795 A078285 
               A103618
%Y A064841 Adjacent sequences: A064838 A064839 A064840 this_sequence A064842 A064843 
               A064844
%K A064841 nonn,easy,base
%O A064841 1,2
%A A064841 N. J. A. Sloane (njas(AT)research.att.com), Oct 31, 2001
%E A064841 More terms from Larry Reeves (larryr(AT)acm.org) and Robert G. Wilson 
               v (rgwv(AT)rgwv.com), Nov 01 2001