81537269760
domain: N
Appears in sequences
- a(n) = Product_{k=1..n} d(k); d(k) = A000005(k) is the number of positive divisors of k.at n=23A066843
- Partial products of A029940 (Product_{d|n} phi(d)).at n=13A280132
- a(n) = A163176(n+1)*A003557(n+1).at n=27A341108
- a(n) = denominator(p(n, x)) / (n!*denominator(bernoulli(n, x))), where p(n, x) = Sum_{k=0..n} E2(n, k)*binomial(x + k, 2*n) / Product_{j=1..n} (j - x) and E2(n, k) are the second-order Eulerian numbers A201637.at n=27A341109