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%I #3 Mar 30 2012 16:49:58
%S 63,69,74,81,100,121,144,213,311,1101,10000,1010001,
%T 111111111111111111111111111111111111111111111111111111111111111111111111111111111
%N a(n) = 81 written in base 13 - n.
%K nonn,fini,full
%O 0,1
%A _N. J. A. Sloane_, Jun 04 2004