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 A159933 #4 Mar 31 2016 11:04:30 %S A159933 1,1,-1,0,-1,2,-1,-1,3,-4,2,2,-3,0,0,6,-7,-5,14,-2,-14,6,13,-12,-2,6, %T A159933 -1,-8,7,36,-79,15,108,-100,-23,32,83,-60,-167,306,-133,-184,318,-158, %U A159933 -91,54,295,-232,-641,1059,180,-1470,497,1404,-1069,-978,1396,386 %N A159933 INVERTi transform of d(n), A000005. %C A159933 Preface d(n) with a 1: (1, 1, 2, 2, 3, 2,...); then convolved with A159933 = the next term in d(n). %F A159933 INVERTi transform of d(n): (1, 2, 2, 3, 2, 4, 2, 4, 3,...). %e A159933 d(6) = 4 = (1, 1, 2, 2, 3, 2) dot (2, -1, 0, -1, 1, 1) = (2, -1, 0, -2, 3, 2) = 4. %Y A159933 Cf. A000005, A159934. %K A159933 sign %O A159933 1,6 %A A159933 _Gary W. Adamson_, Apr 26 2009 %E A159933 More terms from _Alois P. Heinz_, Mar 31 2016