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 A176001 #9 Mar 31 2012 10:26:26
%S A176001 0,0,0,0,-1,-2,-3,-3,-3,-3,-4,-5,-6,-6,-6,-6,-7,-8,-9,-9,-9,-9,-10,
%T A176001 -11,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,-12,
%U A176001 -12,-12,-12,-12,-12,-12,-12,-13,-14,-15,-16,-17,-18,-19,-20,-21,-22,-23
%N A176001 Det(M) where M is an n X n matrix with M(i,j) = floor(sin(i-j)).
%t A176001 M[n_] := Table[Floor[Sin[i - j]], {i, n}, {j, n}];aux=Table[Det[M[n]], {n, 150}]; ListPlot[aux]
%K A176001 sign
%O A176001 1,6
%A A176001 _José María Grau Ribas_, Apr 05 2010