OFFSET
0,5
COMMENTS
The main diagonal gives A001764 ( C(3n,n)/(2n+1) ). First column is given by g.f: (1+x) - x^2*(1+x)^3. Antidiagonal sums result in binomial {1,1,0,...}.
EXAMPLE
Rows begin:
{1},
{1,1},
{-1,3,3},
{-3,0,15,12},
{-3,-14,15,84,55},
{-1,-27,-75,168,495,273},
{0,-9,-270,-336,1485,3003,1428},
{0,47,-252,-2352,-825,12012,18564,7752}, ...
CROSSREFS
KEYWORD
sign,tabl
AUTHOR
Paul D. Hanna, Jul 25 2003
STATUS
approved