Search: id:A066737
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%I A066737
%S A066737 22,25,27,32,33,35,52,55,57,72,75,77,112,115,117,132,133,135,172,175,
%T A066737 177,192,195,213,217,219,222,225,231,232,235,237,243,247,252,253,255,
%U A066737 259,261,267,272,273,275,279,289,292,295,297,312,315,319,322,323,325
%N A066737 Composite numbers that are concatenations of primes.
%F A066737 A066737 = A152242 \ A000040 = A152242 intersect A002808. [From M. F. 
               Hasler (MHasler(AT)univ-ag.fr), Oct 16 2009]
%e A066737 72 is the concatenation of primes 7 and 2. 132 is the concatenation of 
               primes 13 and 2. 225 is the concatenation of 2, 2 and 5.
%o A066737 (PARI) for(n=1,999, !isprime(n) & is_A152242(n) & print1(n", ")) [From 
               M. F. Hasler (MHasler(AT)univ-ag.fr), Oct 16 2009]
%Y A066737 Cf. A121609.
%Y A066737 Sequence in context: A061411 A053779 A034304 this_sequence A121609 A092631 
               A061371
%Y A066737 Adjacent sequences: A066734 A066735 A066736 this_sequence A066738 A066739 
               A066740
%K A066737 base,easy,nonn
%O A066737 1,1
%A A066737 Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Jan 15 2002
%E A066737 More terms from Larry Reeves (larryr(AT)acm.org), Apr 03 2002
%E A066737 Missing terms added by M. F. Hasler (MHasler(AT)univ-ag.fr), Oct 16 2009

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