25920000

Appears in sequences

• Square array T(n,k) read by antidiagonals: denominators of Stirling numbers of first kind with negative argument S1(-n,k), n,k>=0.at n=39A103880
• Even refactorable numbers k such that the number r of odd divisors and the number s of even divisors are both odd divisors of k and k is the first number for which the triple (r,s,t) occurs, where t is the number of divisors of k.at n=33A120358
• Let k(n) = mod(3,n)-1. Then a(n) = 4*a(n-1) if n is odd, otherwise ((5+k(n))/4)*a(n-1), with a(0) = 1, a(1) = 2.at n=22A123761
• Product of non-exponential divisors of n.at n=59A160199
• a(n) = Product_{d|n} psi(d), where psi(m) is the sum of totatives of m (A023896).at n=29A280246
• Denominators of poly-Bernoulli numbers B_n^(k) with k=5.at n=5A283922
• Product of the first n terms of A007318 (Pascal), read as a sequence.at n=22A321741
• a(n) = product of divisors d of n that are not coreful.at n=59A378689
• a(n) = (-1)^n*A387347(n,n).at n=7A392805