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 A118420 #11 Feb 16 2025 08:33:01 %S A118420 7,10,18,64,71,527,1992,5644,8813,19692 %N A118420 Indices of Glaisher-primes: values n such that the concatenation of the first n decimal digits of the Glaisher-Kinkelin constant is prime. %H A118420 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConstantPrimes.html">Constant Primes</a> %H A118420 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Glaisher-KinkelinConstantDigits.html">Glaisher-Kinkelin Constant Digits</a> %H A118420 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a> %e A118420 A = 1.282427129100622636..., 1282427--the concatenation of the first 7 decimal digits--is prime, so a(1)=7. %Y A118420 Cf. A074962, A118419. %K A118420 nonn,more,base %O A118420 1,1 %A A118420 _Eric W. Weisstein_, Apr 27 2006 %E A118420 a(10) = 19692 from _Eric W. Weisstein_, Apr 29 2006 %E A118420 Edited by _Charles R Greathouse IV_, Apr 27 2010