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 A051857 #19 Nov 14 2019 12:56:11 %S A051857 2,3,5,7,38,2319,2996,3321,3892 %N A051857 Numbers n such that (n!)^2-n!+1 is prime. %C A051857 a(1)-a(9) are verified primes using BLS option in pfgw. - _Robert Price_, Aug 24 2014 %C A051857 a(10) > 15000. - _Robert Price_, Aug 24 2014 %H A051857 C. K. Caldwell, <a href="http://www.utm.edu/research/primes/">The Prime Pages</a> %H A051857 C. Nash, <a href="http://pages.prodigy.net/chris_nash/primeform.html">Prime Form</a> [?Broken link] %H A051857 M. Oakes, <a href="http://groups.yahoo.com/group/primeform/message/10881">Re: Gaussian primorial and factorial primes</a>, Primeform, Dec 21 2010 %H A051857 Mike Oakes, Andrew Walker, David Broadhurst, <a href="/A046029/a046029.txt">Gaussian primorial and factorial primes</a>, digest of 7 messages in primeform Yahoo group, Dec 20 - Dec 21, 2010. %o A051857 (PARI) isok(n) = isprime((n!)^2-n!+1); \\ _Michel Marcus_, Aug 26 2013 %Y A051857 Cf. A002981, A002982, A046029, A051856. %K A051857 nonn,hard,more %O A051857 1,1 %A A051857 Andrew Walker (ajw01(AT)uow.edu.au), Dec 13 1999 %E A051857 a(7)-a(9) from _Robert Price_, Aug 24 2014