%I A073646
%S A073646 1,2,3,22,5,23,7,222,33,25,11,223,13,27,35,2222,17,233,19,225,37,112,
%T A073646 23,2223,55,132,333,227,29,235,31,22222,113,172,57,2233,37,192,133,
%U A073646 2225,41,237,43,1122,335,223,47,22223,77,255,173,1322,53,2333,115,2227
%N A073646 Least number formed by concatenating prime factors of n in base 10.
%C A073646 a(n)<=A037276(n) for all n and a(n)=A037276(n) for n<22, a(22) = a(2*11) 
               = 112 <> A037276(22) = 211.
%e A073646 a(6) = a(2*3) = 23 < 32; a(66) = a(2*3*11) = 1123 < 1132 < 2113 < 2311 
               < 3112 < 3211.
%Y A073646 Different from A037276. Cf. A084797.
%Y A073646 Sequence in context: A141458 A080670 A073647 this_sequence A109671 A037276 
               A068190
%Y A073646 Adjacent sequences: A073643 A073644 A073645 this_sequence A073647 A073648 
               A073649
%K A073646 nonn,base
%O A073646 1,2
%A A073646 Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 29 2002