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 A065151 #10 Jun 18 2018 03:25:47 %S A065151 2,2,3,2,3,2,3,5,7,2,3,2,3,5,7,2,3,2,3,5,7,2,3,5,7,11,13,2,3,2,3,5,7, %T A065151 11,13,2,3,5,7,2,3,2,3,5,7,2,3,5,7,11,13,2,3,5,7,11,13,2,3,2,3,5,7,11, %U A065151 13,2,3,5,7,2,3,2,3,5,7,11,13,2,3,5,7,2,3,5,7,11,13,2,3,5,7,11,13,17 %N A065151 a(n) = prime(1 + A064722(n)). %H A065151 Harry J. Smith, <a href="/A065151/b065151.txt">Table of n, a(n) for n = 2..1000</a> %F A065151 a(n) = prime(PrimePi(prime(n)) - prime(PrimePi(n)) + 1) = A000040(A000720(A000040(n)) - A000040(A000720(n)) + 1). %o A065151 (PARI) { for (n = 2, 1000, a=prime(n - precprime(n) + 1); write("b065151.txt", n, " ", a) ) } \\ _Harry J. Smith_, Oct 13 2009 %Y A065151 Cf. A000040, A000720, A064722. %K A065151 nonn %O A065151 2,1 %A A065151 _Labos Elemer_, Oct 19 2001