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 A080236 #5 Apr 25 2016 12:19:23
%S A080236 1,1,-1,1,0,-2,1,1,-2,-2,1,2,-1,-4,-1,1,3,1,-5,-5,1,1,4,4,-4,-10,-4,4,
%T A080236 1,5,8,0,-14,-14,0,8,1,6,13,8,-14,-28,-14,8,13,1,7,19,21,-6,-42,-42,
%U A080236 -6,21,19,1,8,26,40,15,-48,-84,-48,15,40,26
%N A080236 Triangle of differences of consecutive pairs of row elements of triangle A080233.
%C A080236 Row sums are given by -A023443.
%e A080236 Rows are {1}, {1,-1}, {1,0,-2}, {1,1,-2,-2}, {1,2,-1,-4,-1}, ...
%Y A080236 Cf. A080233, A007318.
%K A080236 sign,tabl
%O A080236 0,6
%A A080236 _Paul Barry_, Feb 09 2003