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Clog sequence in base 10. Right to left concatenation of n, int(log_10(n)), int(log_10(int(log_10(n)))),... in base10.
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%I #4 Mar 30 2012 17:20:44

%S 1,2,3,4,5,6,7,8,9,110,111,112,113,114,115,116,117,118,119,120,121,

%T 122,123,124,125,126,127,128,129,130,131,132,133,134,135,136,137,138,

%U 139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,155

%N Clog sequence in base 10. Right to left concatenation of n, int(log_10(n)), int(log_10(int(log_10(n)))),... in base10.

%K nonn,base,easy

%O 1,2

%A _Olivier GĂ©rard_