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 A119570 #11 Sep 08 2022 08:45:25 %S A119570 2,13,19,23,37,41,43,53,59,73,79,83,89,103,107,109,113,137,151,157, %T A119570 163,167,173,179,191,193,199,211,223,227,229,233,239,251,257,263,271, %U A119570 277,281,283,293,311,313,317,337,347,349,353,367,373,383,389,401,431,433 %N A119570 Primes p such that p^2 - p - 1 is not prime. %t A119570 Select[Prime[Range[250]], Not[PrimeQ[ #^2-#-1]]&] %o A119570 (Magma) [p: p in PrimesUpTo(700)| not IsPrime(p^2-p-1)] // _Vincenzo Librandi_, Jan 29 2011 %Y A119570 Cf. A091567 (Primes p such that p^2-p-1 is prime), %Y A119570 A091568 (Primes of the form p^2-p-1, where p is prime). %K A119570 nonn %O A119570 1,1 %A A119570 _Alexander Adamchuk_, Jul 27 2006