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 A121931 #14 Aug 28 2025 17:15:27
%S A121931 0,1,2,58,75,347
%N A121931 Numbers k such that (k!)^8 + 1 is prime.
%C A121931 Corresponding primes of the form (k!)^8 + 1 are {2,2,257,...}.
%C A121931 a(7) > 7000. - _Robert Price_, Aug 26 2014
%t A121931 Do[f=(n!)^8+1;If[PrimeQ[f],Print[{n,f}]],{n,1,75}]
%Y A121931 Cf. A060890, A051855, A046029, A002981.
%K A121931 nonn,hard,more,changed
%O A121931 1,3
%A A121931 _Alexander Adamchuk_, Sep 10 2006
%E A121931 a(6) from _Ryan Propper_, Jan 03 2008