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%I #4 Dec 05 2013 19:57:05
%S 1,2,3,4,5,6,7,8,9,20,21,22,23,24,25,26,27,28,29,40,41,42,43,44,45,46,
%T 47,48,49,60,61,62,63,64,65,66,67,68,69,80,81,82,83,84,85,86,87,88,89,
%U 100,101,102,103,104,105,106,107,108,109,120,121,122,123,124,125,126
%N a(n) = concatenation of k times the k-th digit of n.
%C The obvious pattern only holds until a(149) = 389; a(150) = 3100. - _Joshua Zucker_, May 08 2006
%e a(12) = {concatenation 2*1, 1*2}= 22. a(111)= 321.
%e a(12345) = 58985.
%K base,easy,nonn
%O 1,2
%A _Amarnath Murthy_, Aug 22 2005
%E More terms from _Joshua Zucker_, May 08 2006
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