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%I #3 Mar 30 2012 17:26:22
%S 127,401,19,53,151,7,139,127,19,78721,3458771,19,7,38954263,19,79,53,
%T 19,157,7,19,127,18191,19,12119,421,7,127,401,19,53,151,7,139,127,19,
%U 78721,3458771,19,7,38954263,19,79,53,19,157,7,19,127,18191,19,12119,421,7
%N a(n)=least prime factor of (9*10^m-11)/7, m=6n-4.
%e n=2, m=8, (9*10^m-11)/7 = 128571427=401*320627 hence a(2)=401
%Y Cf. A100275, A122862.
%K nonn
%O 1,1
%A _Zak Seidov_, Sep 22 2006
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