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 A023282 #23 Sep 08 2022 08:44:47 %S A023282 71,97,103,263,883,907,1747,1867,2251,2281,2693,2791,2857,3067,3541, %T A023282 4073,4513,4597,4663,4793,6047,6971,6983,8761,9091,9203,9311,9377, %U A023282 10343,11131,11437,12037,12107,12401,13451,13627,14887,15881,16217,16301,16493,16871 %N A023282 Primes that remain prime through 3 iterations of function f(x) = 4x + 9. %C A023282 Primes p such that 4*p+9, 16*p+45 and 64*p+189 are also primes. - _Vincenzo Librandi_, Aug 04 2010 %H A023282 John Cerkan, <a href="/A023282/b023282.txt">Table of n, a(n) for n = 1..10000</a> %t A023282 Select[Prime@ Range@ 2100, Times @@ Boole@ PrimeQ@ Rest@ NestList[4 # + 9 &, #, 3] > 0 &] (* _Michael De Vlieger_, Sep 20 2016 *) %o A023282 (Magma) [n: n in [1..150000] | IsPrime(n) and IsPrime(4*n+9) and IsPrime(16*n+45) and IsPrime(64*n+189)] // _Vincenzo Librandi_, Aug 04 2010 %Y A023282 Subsequence of A023216, A023251, and of A111199. %K A023282 nonn %O A023282 1,1 %A A023282 _David W. Wilson_