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 A215435 #8 Sep 08 2022 08:46:03
%S A215435 3,53,367,20411,10301051460877537453973547542467,
%T A215435 7509466514979724803946715958615457
%N A215435 Primes of form 3^k + k^3 - 1.
%H A215435 Vincenzo Librandi, <a href="/A215435/b215435.txt">Table of n, a(n) for n = 1..11</a>
%t A215435 Select[Table[3^n + n^3 - 1, {n, 0, 500}], PrimeQ ]
%o A215435 (Magma) [ a: n in [0..250] | IsPrime(a) where a is 3^n + n^3 - 1 ]
%K A215435 nonn
%O A215435 1,1
%A A215435 _Vincenzo Librandi_, Sep 03 2012