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 A023283 #21 Sep 08 2022 08:44:47 %S A023283 19,373,607,1171,1381,1867,2137,2539,3181,4021,5689,5827,5857,6163, %T A023283 7213,7507,11497,12007,13291,13687,14173,15193,16453,21997,22501, %U A023283 24799,25657,28723,31393,31957,32587,35863,40813,42667,42859,43321,43951,45061,45691 %N A023283 Primes that remain prime through 3 iterations of function f(x) = 5x + 2. %C A023283 Primes p such that 5*p+2, 25*p+12 and 125*p+62 are also primes. - _Vincenzo Librandi_, Aug 04 2010 %H A023283 John Cerkan, <a href="/A023283/b023283.txt">Table of n, a(n) for n = 1..10000</a> %F A023283 a(n) == 1 (mod 6). - _John Cerkan_, Sep 20 2016 %t A023283 Select[Prime@ Range@ 4800, Times @@ Boole@ PrimeQ@ Rest@ NestList[5 # + 2 &, #, 3] > 0 &] (* _Michael De Vlieger_, Sep 20 2016 *) %o A023283 (Magma) [n: n in [1..150000] | IsPrime(n) and IsPrime(5*n+2) and IsPrime(25*n+12) and IsPrime(125*n+62)] // _Vincenzo Librandi_, Aug 04 2010 %Y A023283 Subsequence of A023217, A023252, and of A111223. %K A023283 nonn %O A023283 1,1 %A A023283 _David W. Wilson_