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 A095373 #11 Jan 06 2025 16:05:10
%S A095373 2,3,8,15,26,33,146,320,1068,1505
%N A095373 Integers k such that A095372(k) = 1 + 90*(-1+100^k)/99 is prime.
%C A095373 a(11) > 40000. - _Michael S. Branicky_, Jan 06 2025
%e A095373 Corresponding primes are: 9091, 909091, 909090909090909091, 909090909090909090909090909091, ...
%t A095373 {ta=Table[0, {100}], u=1}; Do[s=1+(90*(100^n-1)/99);If[PrimeQ[s], Print[{n, s}]; ta[[u]]=s;u=u+1], {n, 1, 320}] ta
%Y A095373 Cf. A095372, A002275, A095370, A095371.
%K A095373 more,nonn
%O A095373 1,1
%A A095373 _Labos Elemer_, Jun 07 2004
%E A095373 a(9)-a(10) from _Max Alekseyev_, Jan 28 2012