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 A298702 #26 May 04 2018 05:42:30
%S A298702 1,2,3,6,11,15,17,19,22,51,867,1909,9641
%N A298702 Numbers k such that k!+1 reversed is a prime.
%C A298702 a(14) > 19200, if it exists. - _Giovanni Resta_, May 04 2018
%t A298702 Do[If[PrimeQ[FromDigits[Reverse[IntegerDigits[n! + 1]]]], Print[n]], {n, 400}] (* _Vincenzo Librandi_, Jan 25 2018 *)
%o A298702 (PARI) isok(n) = isprime(fromdigits(Vecrev(digits(n!+1)))); \\ _Michel Marcus_, Jan 26 2018
%Y A298702 Cf. A002981.
%K A298702 nonn,base,more
%O A298702 1,2
%A A298702 _Paolo Galliani_, Jan 25 2018
%E A298702 a(1)-a(3) and a(8)-a(10) from _Vincenzo Librandi_, Jan 25 2018
%E A298702 a(11)-a(12) from _Paolo Galliani_, May 02 2018
%E A298702 a(13) from _Giovanni Resta_, May 04 2018