A327417 a(n) = A291451(2*n, n).

1, 1, 682, 7128576, 429120851544, 94066556834970720, 57496301859366489159040, 82247725949165261902606309120, 243263294602173417290925789755652480, 1356449073308047884259226117174893156252800, 13275987570857688650109290727617026478737341900800

Offset: 0

Author

Peter Luschny, Sep 14 2019

Keywords

• nonn

Crossrefs

Cf. A007820 (m=1), A327416 (m=2), this sequence (m=3), A327418 (m=4).

Associated triangles: A048993 (m=1), A156289 (m=2), A291451 (m=3), A291452 (m=4).

Programs

Sage

# uses[P from A327416]
def A327417(n): return P(3, 2*n).list()[n]//factorial(n)
print([A327417(n) for n in range(11)])