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 A188583 #19 Sep 08 2022 08:45:56 %S A188583 3,5,13,41,97,131,223,283,353,397,461,467,523,577,661,677,691,773,811, %T A188583 887,937,997,1091,1223,1277,1321,1447,1487,1567,1571,1637,1721,1741, %U A188583 1777,1823,1861,2161,2243,2273,2341,2351,2357,2371,2383,2467,2551 %N A188583 Primes p such that 6*p^3+1 is also prime. %H A188583 Bruno Berselli, <a href="/A188583/b188583.txt">Table of n, a(n) for n = 1..900</a> %e A188583 For prime p = 283, 6*p^3+1 = 135991123 is prime. %t A188583 Select[Prime[Range[500]],PrimeQ[6#^3+1]&] (* _Harvey P. Dale_, May 13 2011 *) %o A188583 (Magma) [ p: p in PrimesUpTo(2600) | IsPrime(6*p^3+1) ]; %Y A188583 Cf. A052291, A005384; A007693, A153812. %K A188583 nonn %O A188583 1,1 %A A188583 _Bruno Berselli_, Apr 22 2011