OFFSET
0,2
FORMULA
Column k has g.f. x^k(1-b(k+1)x) where b(n)=3n(3n-2)(3n-1)=A054776(n).
EXAMPLE
Triangle begins
1,
-6, 1,
0, -120, 1,
0, 0, -504, 1,
0, 0, 0, -1320, 1,
0, 0, 0, 0, -2730, 1,
0, 0, 0, 0, 0, -4896, 1,
0, 0, 0, 0, 0, 0, -7980, 1,
0, 0, 0, 0, 0, 0, 0, -12144, 1,
0, 0, 0, 0, 0, 0, 0, 0, -17550, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, -24360, 1
CROSSREFS
KEYWORD
AUTHOR
Paul Barry, May 25 2006
STATUS
approved