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 A215238 #10 Oct 31 2017 04:59:36
%S A215238 2,3,113,1637,2971,44293,305663,1133071,370261,1357201,46006769,
%T A215238 268119517,291057379,3429782117,10502593103,10926444583,87241770619,
%U A215238 226751019497,1901687257447
%N A215238 Prime(A215237).
%C A215238 We use offset 0 because A215237 uses that offset.
%C A215238 a(n) is least prime(k) such that there are exactly n primes between prime(k)/2 and prime(k+1)/2. - _Peter Munn_, Oct 22 2017
%F A215238 a(n) = A000040(A215237(n)).
%t A215238 t = Table[PrimePi[Prime[n + 1]/2] - PrimePi[Prime[n]/2], {n, 100000}]; t2 = Flatten[Table[Position[t, n, 1, 1], {n, 0, 8}]]; Prime[t2]
%Y A215238 Cf. A000040, A080192, A104380, A215237.
%K A215238 nonn,hard
%O A215238 0,1
%A A215238 _T. D. Noe_, Oct 11 2012
%E A215238 a(14)-a(18) from _Donovan Johnson_, Oct 13 2012