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 A156150 #3 Jul 14 2012 11:32:23 %S A156150 31,353,9559783,9559903 %N A156150 Primes p such that p+2 = 0 (mod pi(p)) and pi(p)=A000720(p) is prime. %C A156150 A subsequence of A156151. %F A156150 a(n) = A000040(A156149(n)) %o A156150 (PARI) p=c=0; until(0, until( isprime(c++), p=nextprime(p+1)); (p+2)%c & next; print1( p",")) %Y A156150 Cf. A156153. %K A156150 hard,more,nonn %O A156150 1,1 %A A156150 _M. F. Hasler_, Feb 04 2009