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Position of first occurrence of n in concatenated primes (A033308, Copeland-Erdos constant).
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%I #5 Mar 30 2012 18:50:37

%S 1,6,2,3,22,4,32,5,42,13,48,6,63,8,23,78,33,10,96,12,590,111,114,2,

%T 129,132,138,64,150,16,159,9,15,124,25,3,189,20,43,73,207,22,216,24,

%U 228,234,237,26,249,76,258,79,264,28,270,276,279,4,291,30,300,32,830

%N Position of first occurrence of n in concatenated primes (A033308, Copeland-Erdos constant).

%C A033308(a(n))=A000030(n);

%C A033308(a(n)+i)=A033307(A086044(n)+i), 0<=i < A055642(n).

%H Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/Copeland-ErdosConstant.html">Copeland-Erdos Constant</a>

%Y Cf. A086049, A086044.

%K nonn,base

%O 1,2

%A _Reinhard Zumkeller_, Jul 07 2003