a(n) = (2*n)! * hypergeom([3/2, 2, 1-n], [3, 2 - 2*n], 4) for n >= 1 and a(0) = 1.
A344056
a(n) = (2*n)! * hypergeom([3/2, 2, 1-n], [3, 2 - 2*n], 4) for n >= 1 and a(0) = 1.
Terms
- a(0) =1a(1) =2a(2) =72a(3) =3960a(4) =354816a(5) =47952000a(6) =9169459200
External references
- oeis: A344056