Search: id:A038524
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%I A038524
%S A038524 8,24,28,34,50,52,58,71,77,163,197,235,238,319,570,669,949,958
%N A038524 Numbers n such that the n-th Fibonacci number is composite and the concatenation 
               of its prime factors (written in base 10 in ascending order) is prime.
%H A038524 Blair Kelly, <a href="http://home.att.net/~blair.kelly/mathematics/fibonacci">
               Fibonacci and Lucas Factorizations</a>.
%e A038524 F(24) = 46368 = 2^5 * 3^2 * 7 * 23 is composite and the concatenation 
               2222233723 is prime, so 24 is in the sequence.
%Y A038524 Sequence in context: A060476 A048109 A068781 this_sequence A162829 A000118 
               A096727
%Y A038524 Adjacent sequences: A038521 A038522 A038523 this_sequence A038525 A038526 
               A038527
%K A038524 hard,base,nonn
%O A038524 1,1
%A A038524 Jeff Burch (gburch(AT)erols.com)
%E A038524 More terms from Jens Kruse Andersen (jens.k.a(AT)get2net.dk), Jan 05 
               2003
%E A038524 949 and 958 established as next two terms by Ryan Propper (rpropper(AT)stanford.edu), 
               May 29 2006

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