Search: id:A048054
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%I A048054
%S A048054 4,9,43,204,1499,9538,71142,535578,4197196,33619380
%N A048054 Number of n-digit reversible primes (emirps).
%C A048054 The count includes palindromes.
%e A048054 2, 3, 5 and 7 are 1-digit reversible primes, so a(1)=4.
%Y A048054 Cf. A003684, A006567, A007628, A046732, A048051, A048052, A048053, A048895.
%Y A048054 Sequence in context: A149169 A138544 A093149 this_sequence A149170 A024053 
               A048892
%Y A048054 Adjacent sequences: A048051 A048052 A048053 this_sequence A048055 A048056 
               A048057
%K A048054 base,nonn
%O A048054 1,1
%A A048054 Jud McCranie (j.mccranie(AT)comcast.net)

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