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Golc sequence in base 5. Left to right concatenation of n,int(log_5(n)),int(log_5(int(log_5(n)))),... in base5.
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%I #4 Mar 30 2012 17:20:44

%S 5,10,15,20,26,31,36,41,46,51,56,61,66,71,76,81,86,91,96,101,106,111,

%T 116,121,635,660,685,710,735,760,785,810,835,860,885,910,935,960,985,

%U 1010,1035,1060,1085,1110,1135,1160,1185,1210,1235,1260,1285,1310

%N Golc sequence in base 5. Left to right concatenation of n,int(log_5(n)),int(log_5(int(log_5(n)))),... in base5.

%K nonn,base,easy

%O 1,1

%A _Olivier GĂ©rard_