%I #2 Dec 05 2013 19:57:00
%S 45,20,18,12,5,6,7,8,9,450,495,432,364,392,315,336,255,270,285,200,
%T 210,220,230,240,150,156,162,168,174,180,186,192,198,102,105,108,111,
%U 114,117,120,123,126,129,132
%N Sum of k-digit multiples of n where k is the number of digits in n.
%e a(12) = 12 +24 +...+84 +96= 432.
%K base,easy,nonn
%O 1,1
%A _Amarnath Murthy_, Jul 19 2005