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 A249597 #16 Feb 06 2015 11:07:54 %S A249597 1,32,3,88,260,15192960,28,61616,9,7888549122400,55,182208,132538588, %T A249597 2240,165,32048741728,1185506696,2194329698227926780769440,247, %U A249597 23264534699960,69737318935284,179872,14559920,16912071582760464,130885300,69521680967024,27 %N A249597 Analog of A097717 in base 3. %H A249597 Lars Blomberg, <a href="/A249597/b249597.txt">Table of n, a(n) for n = 1..709</a> %Y A249597 Cf. A094676, A249596, A249598, A249599. %K A249597 nonn,base %O A249597 1,2 %A A249597 _R. J. Mathar_, Mar 30 2009 %E A249597 a(6)-a(26) from _Lars Blomberg_, Feb 04 2015