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 A145230 #4 Jun 02 2025 00:38:24 %S A145230 1,2,3,7,17,38 %N A145230 Numbers of different values of the minimal factors s for primes of the form 4k+1 not exceeding 10^n (see A145215). %Y A145230 A145016 A145022 A145023 A145047 A145048 A145049 A145050 A145215 %K A145230 nonn %O A145230 1,2 %A A145230 _Vladimir Shevelev_, Oct 05 2008