%I #3 Mar 30 2012 16:49:57
%S 1111111111111,1101,111,31,23,21,16,15,14,13,12,11,10
%N a(n) = 13 written in base n.
%C The next term contains a non-decimal digit.
%K nonn
%O 1,1
%A _N. J. A. Sloane_, Jun 04 2004