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 A177104 #14 Sep 08 2022 08:45:53 %S A177104 3,31,43,61,139,181,199,223,241,331,373,421,523,631,733,859,991,1033, %T A177104 1153,1213,1423,1453,1549,1741,1873,1879,1951,2203,2239,2269,2311, %U A177104 2371,2539,2689,2713,2719,2851,3001,3019,3163,3229,3271,3343,3361,3391,3541 %N A177104 Primes p such that 2*p^3-1 is also prime. %H A177104 Vincenzo Librandi, <a href="/A177104/b177104.txt">Table of n, a(n) for n = 1..1000</a> %F A177104 A000040 INTERSECT A214289. - _R. J. Mathar_, Aug 20 2019 %t A177104 Select[Prime[Range[500]], PrimeQ[2 #^3 - 1]&] (* _Vincenzo Librandi_, Apr 17 2013 *) %o A177104 (Magma) [p: p in PrimesUpTo(10000)| IsPrime(2*p^3-1)]; %K A177104 nonn,easy %O A177104 1,1 %A A177104 _Vincenzo Librandi_, Nov 15 2010