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 A058000 #4 Sep 03 2022 22:10:09
%S A058000 1,3,7,23,47,191,383,1151,6911,27647,138239,691199,3455999,34559999,
%T A058000 138239999,414719999,2073599999,16588799999,364953599999,
%U A058000 4744396799999,66421555199999,132843110399999,664215551999999,3321077759999999
%N A058000 a(n) is smallest prime such that a(n)+1 is a proper multiple of a(n-1)+1 [with a(1)=1].
%F A058000 a(n)= Product{i=1_n}[A036013(i)]-1 = a(n-1)*A036013(n)-1+A036013(n).
%Y A058000 Cf. A036013, A057999.
%K A058000 nonn
%O A058000 1,2
%A A058000 _Henry Bottomley_, Nov 02 2000