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 A023323 #22 Sep 08 2022 08:44:47 %S A023323 2293,5653,11503,76003,88813,100613,142993,294793,314983,351383, %T A023323 419603,463633,473293,520363,682063,694523,780733,836873,872393, %U A023323 895003,1004063,1043723,1085473,1277593,1290293,1318783,1336463,1446043,1483633,1539773 %N A023323 Primes that remain prime through 4 iterations of function f(x) = 8x + 9. %C A023323 Primes p such that 8*p+9, 64*p+81, 512*p+657 and 4096*p+5265 are also primes. - _Vincenzo Librandi_, Aug 04 2010 %H A023323 Harvey P. Dale, <a href="/A023323/b023323.txt">Table of n, a(n) for n = 1..1000</a> %t A023323 Select[Prime[Range[120000]],AllTrue[Rest[NestList[8#+9&,#,4]],PrimeQ]&] (* _Harvey P. Dale_, Jan 15 2016 *) %o A023323 (Magma) [n: n in [1..5000000] | IsPrime(n) and IsPrime(8*n+9) and IsPrime(64*n+81) and IsPrime(512*n+657) and IsPrime(4096*n+5265)] // _Vincenzo Librandi_, Aug 04 2010 %K A023323 nonn %O A023323 1,1 %A A023323 _David W. Wilson_