1,1
a(2)=166 because 166 is the smallest semiprime containing exactly two 6's.
Sequence in context: A052466 A078535 A143534 this_sequence A106661 A003720 A002884
Adjacent sequences: A104726 A104727 A104728 this_sequence A104730 A104731 A104732
base,nonn
Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 24 2005
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