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 A023346 #19 Sep 08 2022 08:44:47 %S A023346 4259,174079,253369,275699,448859,527159,539639,649969,1101509, %T A023346 1218559,1230629,1319729,1426889,1780939,1929899,1947109,1960919, %U A023346 2082469,2087419,2262409,2479619,2499169,2797999,2808359,2809439,2813339,3089059,3363749 %N A023346 Primes that remain prime through 5 iterations of function f(x) = 7x + 6. %C A023346 Primes p such that 7*p+6, 49*p+48, 343*p+342, 2401*p+2400 and 16807*p+16806 are also primes. - _Vincenzo Librandi_, Aug 05 2010 %H A023346 John Cerkan, <a href="/A023346/b023346.txt">Table of n, a(n) for n = 1..10000</a> %F A023346 a(n) == 9 (mod 10). - _John Cerkan_, Oct 24 2016 %o A023346 (Magma) [n: n in [1..10000000] | IsPrime(n) and IsPrime(7*n+6) and IsPrime(49*n+48) and IsPrime(343*n+342) and IsPrime(2401*n+2400) and IsPrime(16807*n+16806)] // _Vincenzo Librandi_, Aug 05 2010 %Y A023346 Subsequence of A023225, A023259, A023290, A023318, and A024900. %K A023346 nonn %O A023346 1,1 %A A023346 _David W. Wilson_