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 A089254 #3 Mar 30 2012 16:49:50
%S A089254 1,-1,0,-2,1,-2,2,-2,5,-3,8,-3,13,-6,16,-15,21,-28,21,-52,22,-90,23,
%T A089254 -136,40,-190,79,-237,185,-254,385,-219,740,-116,1279,49,2039,198,
%U A089254 2923,130,3785,-541,4215,-2464,3638,-6581,1204,-14062,-3889,-26110,-12267,-43399,-23264,-65206,-34085,-87955,-37666
%N A089254 G.f.: Product_{m>=1} 1/(1+x^m)^A000009(m).
%Y A089254 Cf. A050342, A000009, A001970, A089259.
%K A089254 sign
%O A089254 0,4
%A A089254 _N. J. A. Sloane_, Dec 23 2003