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 A269626 #10 Jun 14 2023 12:56:36 %S A269626 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,5,5,5,5,5,1,1,1,1,1,1,1,1,7,7,7,7,7,7, %T A269626 7,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, %U A269626 1,1,1,1,1,1,1,5,5,55,55,55,55,55,55,55 %N A269626 a(n) = A003418(n) / A058312(n) with a(0) = 1. %o A269626 (PARI) a(n)=lcm([1..n])/denominator(sum(k=1,n,(-1)^(k+1)/k)) %Y A269626 Cf. A003418, A058312, A110566. %K A269626 nonn %O A269626 0,16 %A A269626 _Jeppe Stig Nielsen_, Mar 01 2016