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 A168446 #8 Sep 08 2022 08:45:49 %S A168446 11,13,17,19,29,37,59,67,89,97,149,157,239,269,307,337,359,367,397, %T A168446 419,449,487,509,547,569,659,757,787,839,907,967,997,1117,1259,1289, %U A168446 1319,1409,1559,1567,1657,1747,1867,1949,1987,2099,2287,2309,2339,2399,2437,2459 %N A168446 Primes p such that floor(p/5) is also prime. %H A168446 Vincenzo Librandi, <a href="/A168446/b168446.txt">Table of n, a(n) for n = 1..1000</a> %t A168446 Select[Prime[Range[6! ]],PrimeQ[Floor[ #/5]]&] %o A168446 (Magma) [p: p in PrimesUpTo(2500) | IsPrime(Floor(p/5))]; // _Vincenzo Librandi_, Apr 16 2013 %Y A168446 Cf. A075519, A168447. %K A168446 nonn,easy %O A168446 1,1 %A A168446 _Vladimir Joseph Stephan Orlovsky_, Nov 25 2009 %E A168446 Definition and values corrected by _R. J. Mathar_, Dec 06 2009