OFFSET
0,4
COMMENTS
Inverse is A117178. Row sums are (-1)^n*A098554(n+1). Diagonal sums are 1,0,-2,0,2,0,-2,... with g.f. (1-x^2)/(1+x^2).
Apparently, with the rows de-aerated and then reversed, this matrix becomes signed A034807 with the twos on the diagonal removed. Apparently, |D(2n,k+1)| = |D(2(n-1),k+1)| + |D(2n,k)| where D(n,k) is the k-th element on the n-th diagonal. - Tom Copeland, May 30 2017
EXAMPLE
Triangle begins
1,
0, 1,
-3, 0, 1,
0, -4, 0, 1,
5, 0, -5, 0, 1,
0, 9, 0, -6, 0, 1,
-7, 0, 14, 0, -7, 0, 1,
0, -16, 0, 20, 0, -8, 0, 1
CROSSREFS
KEYWORD
AUTHOR
Paul Barry, Mar 01 2006
STATUS
approved