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 A355137 #11 Jun 24 2022 01:10:21
%S A355137 5,6,41,119,5118
%N A355137 Indices of primes in the sequence A000296.
%C A355137 The next term, if it exists, is > 20000.
%e A355137 5 is in the sequence because A000296(5) = 11 is prime.
%t A355137 s = 1; A000296 = Table[s = BellB[n] - s, {n, 0, 1000}]; Select[Range[1000], PrimeQ[A000296[[#]]]&]
%Y A355137 Cf. A000296, A051130.
%K A355137 nonn,more
%O A355137 1,1
%A A355137 _Vaclav Kotesovec_, Jun 20 2022