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 A024704 #8 May 30 2013 23:28:45 %S A024704 4,7,9,11,13,15,20,21,22,24,25,27,30,31,33,36,39,43,44,46,48,51,52,53, %T A024704 55,56,58,60,64,65,68,71,72,73,76,79,80,83,84,85,87,88,90,92,93,96,98, %U A024704 104,106,108,109,110,111,113,115,116,118,122,128,129,132,133,135,136,140,143,146 %N A024704 Positions of even numbers in A024702. %C A024704 Indices of primes which are 1 or 7 mod 8. - _Charles R Greathouse IV_, May 30 2013 %H A024704 Charles R Greathouse IV, <a href="/A024704/b024704.txt">Table of n, a(n) for n = 1..10000</a> %o A024704 (PARI) apply(n->primepi(n),select(n->n%8==1||n%8==7,primes(100))) \\ _Charles R Greathouse IV_, May 30 2013 %K A024704 nonn,easy %O A024704 1,1 %A A024704 _Clark Kimberling_ %E A024704 Adjusted for offset. - _Charles R Greathouse IV_, May 30 2013