This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A086048 #6 Feb 16 2025 08:32:50 %S A086048 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 A086048 129,132,138,64,150,16,159,9,15,124,25,3,189,20,43,73,207,22,216,24, %U A086048 228,234,237,26,249,76,258,79,264,28,270,276,279,4,291,30,300,32,830 %N A086048 Position of first occurrence of n in concatenated primes (A033308, Copeland-Erdos constant). %C A086048 A033308(a(n))=A000030(n); %C A086048 A033308(a(n)+i)=A033307(A086044(n)+i), 0<=i < A055642(n). %H A086048 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Copeland-ErdosConstant.html">Copeland-Erdos Constant</a> %Y A086048 Cf. A086049, A086044. %K A086048 nonn,base %O A086048 1,2 %A A086048 _Reinhard Zumkeller_, Jul 07 2003