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 A103316 #7 Jan 12 2014 11:25:33
%S A103316 1,-2,1,4,-3,1,-8,7,-4,1,16,-15,11,-5,1,-32,31,-26,16,-6,1,64,-63,57,
%T A103316 -42,22,-7,1,-128,127,-120,99,-64,29,-8,1,256,-255,247,-219,163,-93,
%U A103316 37,-9,1,-512,511,-502,466,-382,256,-130,46,-10,1,1024,-1023,1013,-968,848,-638,386,-176,56,-11,1,-2048,2047,-2036,1981
%N A103316 Riordan array (1/(1+2x), x/(1+x)).
%C A103316 Inverse array of A029653. Signed version of A055248. Row sums are (-1)^n*A011782(n), with g.f. (1+x)/(1+2x). Diagonal sums are (-1)^n*A027934(n), with g.f. (1+x)/((1+2x)(1+x-x^2)).
%F A103316 Number triangle T(n, k)=(-1)^(n-k)*sum{j=0..n, binomial(n, k+j)}
%F A103316 T(n,k)=T(n-1,k-1)-3*T(n-1,k)+2*T(n-2,k-1)-2*T(n-2,k), T(0,0)=1, T(1,0)=-2, T(1,1)=1, T(n,k)=0 if k<0 or if k>n. - _Philippe Deléham_, Jan 12 2014
%e A103316 Rows start {1}, {-2,1}, {4,-3,1}, {-8,7,-4,1},...
%K A103316 easy,sign,tabl
%O A103316 0,2
%A A103316 _Paul Barry_, Jan 30 2005