OFFSET
1,4
EXAMPLE
1;
1,1;
2,2,1;
6,5,3,1;
20,18,9,4,1;
70,70,37,14,5,1;
252,280,162,64,20,6,1;
MATHEMATICA
Table[If[m == n, 1, Sum[(-1)^(m - k) Binomial[m, k] Binomial[n - m + k - 1, m - 1] Binomial[2 n - 3 m + k - 1, n - m], {k, 0, m}]], {n, 11}, {m, n}] (* Michael De Vlieger, Apr 14 2016 *)
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Vladimir Kruchinin, Apr 14 2016
STATUS
approved