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 A290376 #10 Aug 03 2017 11:37:57
%S A290376 3,13,541,47293,7087261,526858348381
%N A290376 Prime Fubini numbers.
%C A290376 Corresponding indices are 2, 3, 5, 7, 9, 13, ... with no more up to 12000.
%t A290376 a[0] = 1; a[n_] := a[n] = Sum[Binomial[n, k]*a[n - k], {k, 1, n}]; Select[a@# & /@ Range@ 20, PrimeQ@# &]
%o A290376 (PARI) lista(nn) = for (n=1, nn, if (isprime(fn=sum(k=1, n, k!*stirling(n, k, 2))), print1(fn, ", "));); \\ _Michel Marcus_, Aug 02 2017
%Y A290376 Cf. A000670.
%K A290376 nonn,more
%O A290376 1,1
%A A290376 _Amiram Eldar_, Jul 28 2017