A371644 a(n) = Product_{k=0..n} binomial(n^2 + k^2, n^2 - k^2).

1, 1, 10, 57915, 8235313944000, 1077099640691257742845893750, 4629575796245443900868634734946423885068807034000

Offset

0,3

Links

Table of n, a(n) for n=0..6.

Formula

a(n) = A371642(n) / A371645(n).

a(n) = A371643(n) / (A371624(n) * A371645(n)).

a(n) ~ c * exp(Pi*n^3/3 + Pi*n/4 + n) / (2^(2*n^3/3 + 3*n/2) * Pi^(n/2) * A^(2*n) * n^(7*n/6 - 1/4)), where c = 0.761512... = 2^(1/4) * A255504 * (c from A371603) / (c from A371645) and A is the Glaisher-Kinkelin constant A074962.

Mathematica

Table[Product[Binomial[n^2+k^2, n^2-k^2], {k, 0, n}], {n, 0, 8}]

Crossrefs

Cf. A371603, A371624, A371642, A371643, A371645.

Sequence in context: A366313 A260797 A055310 * A048832 A225070 A115673

Adjacent sequences: A371641 A371642 A371643 * A371645 A371646 A371647

Keyword

nonn

Author

Vaclav Kotesovec, Mar 31 2024

Status

approved