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 A087191 #9 Sep 08 2022 08:45:11
%S A087191 17,131,409,953,1889,8669,18539,60623,77689,122321,373049,437293,
%T A087191 590267,2249441,8975009,9649303,11111117,14526289,19836689,26484839,
%U A087191 31201649,56608289,67796273,80565889,84021983,87588089,107150489,150402113
%N A087191 Primes of the form k^4 - (k+1)^3.
%H A087191 Vincenzo Librandi, <a href="/A087191/b087191.txt">Table of n, a(n) for n = 1..5000</a>
%e A087191 a(2) = 4^4 - (4+1)^3 = 256 - 125 = 131.
%t A087191 Select[Table[n^4-(n+1)^3,{n,3,101900}],PrimeQ] (* _Vincenzo Librandi_, Dec 10 2011 *)
%o A087191 (Magma) [a: n in [3..120] | IsPrime(a) where a is n^4-(n+1)^3]; // _Vincenzo Librandi_, Dec 10 2011
%Y A087191 Cf. A087190 n such that n^4-(n+1)^3 is prime.
%K A087191 nonn,easy
%O A087191 1,1
%A A087191 _Hugo Pfoertner_, Aug 24 2003