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 A023322 #20 Aug 03 2023 18:42:23 %S A023322 7949,25589,55799,61379,69959,70229,74609,174569,188369,204719,220469, %T A023322 225629,233759,250919,286619,363659,552749,592139,658349,735419, %U A023322 783269,827549,931949,1018889,1065839,1126319,1132739,1187939,1215629,1378529 %N A023322 Primes that remain prime through 4 iterations of function f(x) = 8x + 7. %C A023322 Primes p such that 8*p+7, 64*p+63, 512*p+511 and 4096*p+4095 are also primes. - _Vincenzo Librandi_, Aug 04 2010 %H A023322 John Cerkan, <a href="/A023322/b023322.txt">Table of n, a(n) for n = 1..10000</a> %F A023322 a(n) == 9 (mod 10). - _John Cerkan_, Oct 08 2016 %t A023322 rp4Q[p_]:=AllTrue[Rest[NestList[8#+7&,p,4]],PrimeQ]; Select[Prime[Range[110000]],rp4Q] (* _Harvey P. Dale_, Aug 03 2023 *) %o A023322 (Magma) [n: n in [1..5000000] | IsPrime(n) and IsPrime(8*n+7) and IsPrime(64*n+63) and IsPrime(512*n+511) and IsPrime(4096*n+4095)] // _Vincenzo Librandi_, Aug 04 2010 %Y A023322 Subsequence of A023231, A023263, A023294, and A139487. %K A023322 nonn %O A023322 1,1 %A A023322 _David W. Wilson_