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 A105146 #11 Sep 08 2022 08:45:17 %S A105146 2,6,17,23,26,38,39,42,59,63,83,89,96,102,107,117,135,144,146,153,159, %T A105146 174,179,182,185,189,191,192,194,201,206,230,233,237,240,245,248,249, %U A105146 251,252,270,279,285,287,293,299,300,318,321,329,335,339,345,350,354,356,378,387,392 %N A105146 Numbers k such that the string k100001 is prime. %e A105146 k=2 is in the sequence because k100001 = 2100001 is prime. %e A105146 k=96 is in the sequence because k100001 = 96100001 is prime. %o A105146 (Magma) [ n: n in [1..400] | IsPrime(Seqint([1, 0, 0, 0, 0, 1] cat Intseq(n))) ]; // _Vincenzo Librandi_, Feb 03 2011 %Y A105146 Cf. A105106, A105107. %K A105146 base,nonn %O A105146 1,1 %A A105146 _Parthasarathy Nambi_, Apr 09 2005