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 A103896 #14 Jan 26 2025 08:38:46 %S A103896 1,1,4,20,15700,161520,659739168,11887243200,115875912594352, %T A103896 1360481062410358294032,40999220870977029249072, %U A103896 1854483563489396099991763032000,106016408292727234808287504322403328,4534810991759912394035394805790730240 %N A103896 Euler's totient of prime(n)! / prime(n)# + 1. %H A103896 Amiram Eldar, <a href="/A103896/b103896.txt">Table of n, a(n) for n = 1..30</a> %H A103896 Reinhard Zumkeller, <a href="/A103890/a103890.txt">prime(n)! / prime(n)# + 1</a>. %F A103896 a(n) = A000010(A103890(n)). %Y A103896 Cf. A000010, A103861, A103890. %K A103896 nonn %O A103896 1,3 %A A103896 _Reinhard Zumkeller_, Feb 20 2005