OFFSET
0,6
FORMULA
T(n,k) = T(n,-k).
EXAMPLE
Triangle begins:
1;
1, 0, 1;
1, 14, 80, 14, 1;
1, 78, 1251, 2160, 1251, 78, 1;
1, 252, 9682, 60444, 121200, 60444, 9682, 252, 1;
PROG
(PARI) {T(n, k) = polcoef(polcoef(polcoef(polcoef((-1+(1+w+1/w)*(1+x+1/x)*(1+y+1/y)*(1+z+1/z))^n, k), k), k), k)}
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Seiichi Manyama, Nov 21 2019
STATUS
approved