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%I #2 Mar 30 2012 17:26:30
%S 17,13,17,13,17,17,17,17,31,17,17,17,17,17,13,17,17,17,13,17,17,31,31,
%T 31,13,17,13,17,17,17,17,31,13,13,17,13,17,17,13,17,31,31,31,17,17,31,
%U 13,17,31,17,17,13,37,31,17,31,17,31,31,13,31,13,17,17,31,37,31,17,31
%N a(n) = sum of digits of A168174(n).
%Y Cf. A006567, A168174, A168248.
%K base,nonn
%O 1,1
%A _Zak Seidov_, Nov 21 2009