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 A023289 #23 Sep 08 2022 08:44:47 %S A023289 5,37,127,347,977,2017,3607,5477,9137,10487,13687,14057,14107,19037, %T A023289 19697,19727,20507,22157,23887,24097,25237,25307,26717,26777,27107, %U A023289 29347,30697,33757,33997,34667,34847,35117,35227,37057,40577,40627,41177,41597 %N A023289 Primes that remain prime through 3 iterations of function f(x) = 6x + 7. %C A023289 Primes p such that 6*p+7, 36*p+49 and 216*p+301 are also primes. - _Vincenzo Librandi_, Aug 04 2010 %H A023289 John Cerkan, <a href="/A023289/b023289.txt">Table of n, a(n) for n = 1..10000</a> %F A023289 a(n) == 7 (mod 10), for n > 1. - _John Cerkan_, Sep 21 2016 %o A023289 (Magma) [n: n in [1..150000] | IsPrime(n) and IsPrime(6*n+7) and IsPrime(36*n+49) and IsPrime(216*n+301)] // _Vincenzo Librandi_, Aug 04 2010 %Y A023289 Subsequence of A023222, A023258, and A153218. %K A023289 nonn %O A023289 1,1 %A A023289 _David W. Wilson_