A327418 a(n) = A291452(2*n, n).

1, 1, 8255, 2941884000, 11957867341948125, 294040106448733743008625, 30188472144950452369737153667500, 10143939867539251013312279527292897925000, 9389957475743686923255643914812959599614184703125, 21058194888200109612591474039339954750056969537259132421875

Offset

0,3

Links

Table of n, a(n) for n=0..9.

Prog

(Sage) # uses[P from A327416]
def A327418(n): return P(4, 2*n).list()[n]//factorial(n)
print([A327418(n) for n in range(10)])

Crossrefs

Cf. A007820 (m=1), A327416 (m=2), A327417 (m=3), this sequence (m=4).

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

Sequence in context: A221482 A237221 A031850 * A168664 A345593 A345851

Adjacent sequences: A327415 A327416 A327417 * A327419 A327420 A327421

Keyword

nonn

Author

Peter Luschny, Sep 14 2019

Status

approved