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 A341804 #8 Mar 03 2021 22:04:54 %S A341804 2,5,11,176078293 %N A341804 Primes p dividing (the product of the primes less than p)-1. %C A341804 The initial term 2 is included because the empty product minus 1 (which gives zero) is divisible by 2. %e A341804 The prime 11 is included because 2*3*5*7-1 is divisible by 11. Therefore, the last factor of the product, namely 7, is in A341812. %o A341804 (PARI) t=1;forprime(p=2,,((t-1)%p==0)&&print1(p,", ");t*=p) %Y A341804 Cf. A058233, A066735, A341805, A341812. %K A341804 nonn,hard,more %O A341804 1,1 %A A341804 _Jeppe Stig Nielsen_, Feb 20 2021