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 A141695 #5 Mar 30 2012 18:51:59
%S A141695 0,3,-3,3,5,-8,3,5,7,-15,3,5,7,9,-24,3,5,7,9,11,-35,3,5,7,9,11,13,-48,
%T A141695 3,5,7,9,11,13,15,-63,3,5,7,9,11,13,15,17,-80,3,5,7,9,11,13,15,17,19,
%U A141695 -99,3,5,7,9,11,13,15,17,19,21,-120
%N A141695 Triangle T(n,m) = A120070(n,m)-A143814(n,m) read by rows, 1<=m<n.
%C A141695 Row sums are sum_{1<=m<n} T(n,m)=0.
%F A141695 T(n,n-1) = -A005563(n-2).
%F A141695 T(n,m) = 2*m+1, m<n-1.
%e A141695 0
%e A141695 3 -3
%e A141695 3 5 -8
%e A141695 3 5 7 -15
%e A141695 3 5 7 9 -24
%e A141695 3 5 7 9 11 -35
%e A141695 3 5 7 9 11 13 -48
%e A141695 3 5 7 9 11 13 15 -63
%e A141695 3 5 7 9 11 13 15 17 -80
%K A141695 sign,easy,tabl
%O A141695 2,2
%A A141695 _Paul Curtz_, Sep 11 2008