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 A309532 #9 Aug 12 2019 23:28:26
%S A309532 5,13,97,1499,11321,320483
%N A309532 Numbers k such that (121^k + 1)/122 is prime.
%C A309532 The corresponding primes are terms of A059055. - _Bernard Schott_, Aug 09 2019
%t A309532 Do[p=Prime[n]; If[PrimeQ[(121^p + 1)/122], Print[p]], {n, 1, 1000000}]
%o A309532 (PARI) is(n)=ispseudoprime((121^n+1)/122)
%Y A309532 Cf. A059055.
%K A309532 nonn,more
%O A309532 1,1
%A A309532 _Paul Bourdelais_, Aug 06 2019