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 A020935 #7 May 13 2013 12:04:25 %S A020935 4,6,9,11,16,18,23,24,30,34,36,42,46,47,51,56,62,62,67,71,72,77,80,86, %T A020935 92,96,97,99,100,103,115,119,124,125,132,133,137,141,145,150,154,154, %U A020935 162,162,166,167,177,186,189,189,192,196,197,204,208,214,217,217,221 %N A020935 Greatest k such that (k-th prime) < (5 times n-th prime). %o A020935 (PARI) a(n) = primepi(5*prime(n)) \\ _Michel Marcus_, May 13 2013 %Y A020935 Cf. A020900, A020901, A020934-A020940. %K A020935 nonn %O A020935 1,1 %A A020935 _Clark Kimberling_ %E A020935 More terms from _Henry Bottomley_, Nov 13 2000