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 A229190 #12 Feb 16 2025 08:33:20 %S A229190 48,5,1,2,21,3,31,4,41,12,47,5,62,7,22,77,32,9,95,11,589,110,113,1, %T A229190 128,131,137,63,149,15,158,8,14,123,24,2,188,19,42,72,206,21,215,23, %U A229190 227,233,236,25,248,75,257,78 %N A229190 Beginning position of n in the decimal expansion of the Copeland-Erdos constant. %C A229190 Same as A165449 but including the a(0) term. %H A229190 Eric W. Weisstein, <a href="/A229190/b229190.txt">Table of n, a(n) for n = 0..999</a> %H A229190 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Copeland-ErdosConstantDigits.html">Copeland-Erdos Constant Digits</a> %H A229190 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConstantDigitScanning.html">Constant Digit Scanning</a> %o A229190 (Python) %o A229190 from sympy import primerange %o A229190 from itertools import count, takewhile %o A229190 def afind(plimit): %o A229190 s = "".join(str(p) for p in primerange(1, plimit+1)) %o A229190 return [1+s.find(str(n)) for n in takewhile(lambda i: str(i) in s, count(0))] %o A229190 print(afind(10**4)) # _Michael S. Branicky_, May 01 2021 %Y A229190 Cf. A033308 (decimal expansion of the Copeland-Erdos constant). %Y A229190 Cf. A165449 (same sequence but omitting the a(0) term). %K A229190 nonn,base,less %O A229190 0,1 %A A229190 _Eric W. Weisstein_, Sep 15 2013