%I A063844
%S A063844 645,4369,13747,15709,88357,157641,642001,656601,1507963,2269063,
%T A063844 2313697,4101637,7428421
%N A063844 Smith numbers which are also base-2 pseudoprimes.
%e A063844 645 is a member since 645=3*5*43, sum of digits of 645 is 6+4+5=15, sum 
               of digits of prime factors = 3+5+4+3=15
%Y A063844 Sequence in context: A061324 A089295 A100873 this_sequence A067845 A057942 
               A046020
%Y A063844 Adjacent sequences: A063841 A063842 A063843 this_sequence A063845 A063846 
               A063847
%K A063844 base,nonn
%O A063844 1,1
%A A063844 Shyam Sunder Gupta (guptass(AT)rediffmail.com), Aug 25 2001