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 A124855 #17 Sep 08 2022 08:45:28 %S A124855 1,5,11,19,25,31,41,49,59,65,89,91,109,115,121,125,151,161,179,181, %T A124855 205,209,229,241,245,275,305,329,331,349,355,361,371,389,415,439,509, %U A124855 515,521,535,551,595,599,625,661,665,671,719,725,749,755,769,779,791,839 %N A124855 Numbers k such that 3k + 4 and 4k + 3 are primes. %t A124855 Select[Range[850], PrimeQ[3# + 4] && PrimeQ[4# + 3] &] (* _Ray Chandler_, May 11 2007 *) %o A124855 (Magma) [n: n in [0..1000] | IsPrime(3*n+4) and IsPrime(4*n+3)] // _Vincenzo Librandi_, Mar 26 2010 %Y A124855 Intersection of A034936 and A095278. Prime terms are in A106068. %K A124855 nonn %O A124855 1,2 %A A124855 _Zak Seidov_, Nov 10 2006