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 A222963 #30 Sep 08 2022 08:46:04 %S A222963 0,4,10,28,40,70,88,130,208,238,340,418,460,550,700,868,928,1120,1258, %T A222963 1330,1558,1720,1978,2350,2548,2650,2860,2968,3190,4030,4288,4690, %U A222963 4828,5548,5698,6160,6640,6970,7480,8008,8188 %N A222963 a(n) = (p-3)*(p+3)/4 where p is the n-th prime. %C A222963 Old name was: Numbers n such that sqrt(4*n+9) is prime. %H A222963 Vincenzo Librandi, <a href="/A222963/b222963.txt">Table of n, a(n) for n = 2..1000</a> %F A222963 4*a(n)+9 = A001248(n). %F A222963 a(n) = A166011(n)/2. - _Michel Marcus_, Apr 22 2016 %t A222963 Select[Range[0, 10000], PrimeQ[Sqrt[4 # + 9]]&] %o A222963 (Magma) [(p^2-9)/4: p in PrimesInInterval(3, 200)]; %Y A222963 Subsequence of A028552. %Y A222963 Cf. A000040, A001248, A005097, A168669. %K A222963 nonn,easy %O A222963 2,2 %A A222963 _Vincenzo Librandi_, Apr 05 2013