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 A238399 #11 Feb 27 2014 04:53:06 %S A238399 2,3,7,55,255,478,663,984,1237,1955,3021,3214,8312,13519,38267,40805, %T A238399 45400,47444,48835,55269,56758,59032,66067,92141,93063,103620,106611, %U A238399 108602,112713,140874,151335,163314,178215,183330,211350,235410,244165,265160,275971 %N A238399 a(n) is the number of primes occurring between A053182(n) and A053183(n) (excluding the endpoints). %H A238399 Giovanni Resta, <a href="/A238399/b238399.txt">Table of n, a(n) for n = 1..2500</a> %t A238399 (PrimePi[#^2 + #] - PrimePi[#]) & /@ Select[Prime@Range@500, PrimeQ[#^2 + # + 1] &] (* _Giovanni Resta_, Feb 27 2014 *) %Y A238399 Cf. A053182, A053183 %K A238399 nonn %O A238399 1,1 %A A238399 _Torlach Rush_, Feb 26 2014 %E A238399 a(33)-a(39) from _Giovanni Resta_, Feb 27 2014