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 A228512 #19 Feb 16 2025 08:33:20 %S A228512 26,63,323,784 %N A228512 Numbers n such that first n digits of A091725 (decimal expansion of second exponential integral at 1, ExpIntegralEi[1]) gives a prime number. %C A228512 a(5) > 10^4. %H A228512 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ConstantPrimes.html">Constant Primes</a> %H A228512 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/IntegerSequencePrimes.html">Integer Sequence Primes</a> %Y A228512 Cf. A091725. %K A228512 nonn,more,base %O A228512 1,1 %A A228512 _Robert Price_, Aug 23 2013