%I #4 Dec 05 2013 19:55:33
%S 2,4,6,8,13585,81504,959339,3715372,78137091,2037878170,861472331456,
%T 35628332614704,2509243979641006,97463093398309010,
%U 52748900893862397840,7355609995400651988940,1755796374216684779591144,71520859355651043708177774
%N Smallest number such that the concatenation of first n terms is a proper multiple of the concatenation of first n natural numbers.
%e 24 = 8*12, 246 = 2*123, 2468= 2*1234, 246813585 = 19993*12345 and 246813585 is a concatenation of first five terms.
%K base,nonn
%O 0,1
%A _Amarnath Murthy_, Aug 26 2002
%E Corrected and extended by _Max Alekseyev_, May 11 2009