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Smallest semiprime ending in exactly n 2's.
0

%I #2 Oct 02 2013 15:47:28

%S 62,22,4222,32222,622222,1222222,142222222,122222222,7222222222,

%T 62222222222,622222222222,4222222222222,62222222222222,

%U 722222222222222,10222222222222222,202222222222222222,322222222222222222

%N Smallest semiprime ending in exactly n 2's.

%e a(3)=4222 is a term because 4222 is the smallest semiprime ending in exactly three 2's.

%K base,nonn

%O 1,1

%A _Shyam Sunder Gupta_, May 12 2005