1,1
Table of n, a(n) for n=1..8.
a(n) ~ c * n^(n*(2*n+1) + 2*gamma) * (2*Pi)^n * exp(1/6 + log(n)^2 - 2*n^2), where c = 1/A306765 and gamma is the Euler-Mascheroni constant A001620.
Table[Product[i*j + 1, {i, 1, n}, {j, 1, n}], {n, 1, 10}]
Table[n!^(2*n) * Product[Binomial[n + 1/j, n], {j, 1, n}], {n, 1, 10}]
Cf. A079478, A101686, A185141, A324444, A306765, A324589, A306907.
Sequence in context: A157064 A058527 A342329 * A306964 A138583 A193747
Adjacent sequences: A306757 A306758 A306759 * A306761 A306762 A306763
nonn
Vaclav Kotesovec, Mar 08 2019
approved
