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 A249682 #6 Nov 04 2014 14:18:53 %S A249682 3,7,11,17,21,15,25,31,37,43,33,45,39,51,61,65,67,71,77,83,85,75,81, %T A249682 87,93,99,105,111,115,119,125,131,133,143,123,129,141,147,153,135,159, %U A249682 165,171,177,175,185,187,197,205,203,217,183,201,189,195,207,213,219 %N A249682 A084937(3n). %H A249682 Reinhard Zumkeller, <a href="/A249682/b249682.txt">Table of n, a(n) for n = 1..10000</a> %o A249682 (Haskell) %o A249682 a249682 = a084937 . (* 3) -- _Reinhard Zumkeller_, Nov 04 2014 %Y A249682 Cf. A084937, A249680-A249683. %K A249682 nonn %O A249682 1,1 %A A249682 _N. J. A. Sloane_, Nov 03 2014