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 A024706 #5 May 31 2013 00:11:50 %S A024706 7,8,12,16,20,21,24,28,29,31,38,41,42,45,46,51,54,57,58,63,72,75,78, %T A024706 83,84,87,91,93,96,98,99,100,102,106,108,112,115,118,124,126,128,131, %U A024706 134,137,140,141,144,145,150,152,153,157,159,162,164,167,169,178,179,184,187,190,191 %N A024706 Positions of multiples of 3 in A024702. %H A024706 Charles R Greathouse IV, <a href="/A024706/b024706.txt">Table of n, a(n) for n = 1..10000</a> %o A024706 (PARI) apply(n->primepi(n), select(n->n%9==1||n%9==8, primes(100))) \\ _Charles R Greathouse IV_, May 31 2013 %K A024706 nonn %O A024706 1,1 %A A024706 _Clark Kimberling_ %E A024706 Adjusted for offset. - _Charles R Greathouse IV_, May 31 2013