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 A057218 #10 Feb 21 2016 03:36:30
%S A057218 2,3,7,5,11,7,43,17,19,11,23,13,79,29,31,17,103,19,457,41,43,23,47,
%T A057218 577,151,53,163,29,59,31,156241,193,67,24481,71,37,223,229,79,41,83,
%U A057218 43,1033,89,271,47,283,97,5881,101,103,53,107,109,331,113,6841,59,2355091201,61
%N A057218 a(n) = least prime of the form n*k! + 1.
%C A057218 First prime in the sequence n + 1, 2n + 1, 6n + 1, 24n + 1, 120n + 1, ...
%C A057218 If p is a prime then a(p-1) = p.
%e A057218 n=275, for k=1,..,24 {1+275*k!}={276,551,.......,170623310476640845824000001} and a(275)=170623310476640845824000001, the prime generated by A057217(275)=24 as 1+275*24!
%o A057218 (PARI) a(n) = k = 1; while (!isprime(p=1+n*k!), k++); p; \\ _Michel Marcus_, Feb 20 2016
%Y A057218 Primes arising in A057217.
%K A057218 nonn
%O A057218 1,1
%A A057218 _Labos Elemer_, Sep 27 2000
%E A057218 More terms from Mark Hudson (mrmarkhudson(AT)hotmail.com), Aug 12 2004