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A327417
a(n) = A291451(2*n, n).
3
1, 1, 682, 7128576, 429120851544, 94066556834970720, 57496301859366489159040, 82247725949165261902606309120, 243263294602173417290925789755652480, 1356449073308047884259226117174893156252800, 13275987570857688650109290727617026478737341900800
OFFSET
0,3
PROG
(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)])
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).
Sequence in context: A043763 A200860 A184547 * A145321 A175155 A174105
KEYWORD
nonn
AUTHOR
Peter Luschny, Sep 14 2019
STATUS
approved