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 A122412 #6 Jun 10 2018 20:26:27 %S A122412 1,2,3,8,15,23,29,46,188,216,326,367,738,1183,1662,2224,2225,3384, %T A122412 3385,4058,5948,14356,30802,31544,33608,104070,118504,325851,597310, %U A122412 1319944,2324139,4140008,4258994,5911613,8040877,17567976,23163297,25203779 %N A122412 Indices of primes occurring in A031133. %H A122412 Jon E. Schoenfield, <a href="/A122412/b122412.txt">Table of n, a(n) for n = 1..52</a> %F A122412 a(n) = pi(A031133(n)). %e A122412 a(4)=8 because the 4th term of A031133 is the 8th prime number. %Y A122412 Cf. A031131, A031132, A031133, A031134, A122413. %K A122412 nonn %O A122412 1,2 %A A122412 _Jon E. Schoenfield_, Sep 02 2006