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 A051855 #24 Sep 08 2022 08:44:59 %S A051855 0,1,2,3,4,13,112,328,11123 %N A051855 Numbers n such that (n!)^4+1 is prime. %H A051855 C. K. Caldwell, <a href="http://www.utm.edu/research/primes/">The Prime Pages</a> %H A051855 C. Nash, <a href="http://pages.prodigy.net/chris_nash/primeform.html">Prime Form</a> [?Broken link] %t A051855 Select[Range[0, 350], PrimeQ[(#!)^4 + 1]&] (* _Vincenzo Librandi_, Aug 15 2013 *) %o A051855 (PARI) isok(n) = isprime(n!^4 + 1); \\ _Michel Marcus_, Aug 15 2013 %o A051855 (Magma) [n: n in [1..300] | IsPrime(Factorial(n)^4+1)]; // _Vincenzo Librandi_, Aug 15 2013 %Y A051855 Cf. A002981, A002982, A046029. %K A051855 nonn %O A051855 1,3 %A A051855 Andrew Walker (ajw01(AT)uow.edu.au), Dec 13 1999 %E A051855 a(9) from _Robert Price_, Jul 24 2014 %E A051855 Prepended a(1)=0, _Robert Price_, Sep 01 2014