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 A146314 #6 Jan 27 2014 00:12:01
%S A146314 1,1,1,1,1,1,1,0,1,1,1,-2,-1,1,1,1,-5,-5,-2,1,1,1,-9,-10,-8,-3,1,1,1,
%T A146314 -14,-14,-14,-11,-4,1,1,1,-20,-14,-14,-17,-14,-5,1,1,1,-27,-6,0,-9,
%U A146314 -19,-17,-6,1,1
%N A146314 Inverse of Riordan array A127543.
%C A146314 A007318*A109466 as infinite lower triangular matrices.
%C A146314 Riordan array (1/(1-x), x*(1-2*x)/(1-x)^2). - _Philippe Deléham_, Jan 27 2014
%F A146314 Number triangle T(n,k)=Sum_{j=0..n, (-1)^(n-j)*C(k,n-j)*C(n,j-k)}.
%e A146314 Triangle begins :
%e A146314 1;
%e A146314 1, 1;
%e A146314 1, 1, 1;
%e A146314 1, 0, 1, 1;
%e A146314 1, -2, -1, 1, 1;
%e A146314 1, -5, -5, -2, 1, 1;
%e A146314 1, -9, -10, -8, -3, 1, 1;
%e A146314 1, -14, -14, -14, -11, -4, 1, 1;
%e A146314 1, -20, -14, -14, -17, -14, -5, 1, 1;
%e A146314 1, -27, -6, 0, -9, -19, -17, -6, 1, 1;...
%Y A146314 Cf. A124341
%K A146314 easy,sign,tabl
%O A146314 0,12
%A A146314 _Philippe Deléham_, Oct 29 2008