OFFSET
0,5
LINKS
Paul D. Hanna, Rows 0..30 as a flattened table of n, a(n) for n = 0..495
EXAMPLE
The triangle of coefficients C(n^2, (n-k)*k), n>=k, k=0..n, begins:
1;
1, 1;
1, 4, 1;
1, 36, 36, 1;
1, 560, 1820, 560, 1;
1, 12650, 177100, 177100, 12650, 1;
1, 376992, 30260340, 94143280, 30260340, 376992, 1;
1, 13983816, 8217822536, 92263734836, 92263734836, 8217822536, 13983816, 1;
1, 621216192, 3284214703056, 159518999862720, 488526937079580, 159518999862720, 3284214703056, 621216192, 1; ...
PROG
(PARI) {T(n, k)=binomial(n^2, (n-k)*k)}
for(n=0, 10, for(k=0, n, print1(T(n, k), ", ")); print(""))
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Paul D. Hanna, Sep 05 2013
STATUS
approved