%I
%S 0,1,1,2,0,2,3,0,0,3,4,0,0,0,4,5,0,0,0,0,5,6,0,0,0,0,0,6,7,0,0,0,0,0,
%T 0,7,8,0,0,0,0,0,0,0,8,9,0,0,0,0,0,0,0,0,9,10,0,0,0,0,0,0,0,0,0,10,11,
%U 0,0,0,0,0,0,0,0,0,0,11,12,0,0,0,0,0,0,0,0,0,0,0,12,13,0,0,0,0,0,0,0,0,0,0
%N Weight array of A144216: a rectangular array by antidiagonals.
%F Start with R(m,n)=(m(m1)+n(n1))/2 for m>=1,n>=1. Put R(m,n)=0 if m=0 or n=0. Define w(m,n)=R(m,n)R(m1,n1)R(m,n1)R(m1,n) for m>=1, n>=1. Then the weight array W={w(m,n)} is A144217. (See A144112.)
%e Northwest corner:
%e 0 1 2 3 4 5
%e 1 0 0 0 0 0
%e 2 0 0 0 0 0
%e 3 0 0 0 0 0
%e 4 0 0 0 0 0
%Y Cf. A144217.
%K nonn,tabl
%O 1,4
%A _Clark Kimberling_, Sep 14 2008
