26754416640domain: NAppears in sequencesProduct of the nonzero digital products of n for all the bases 1 to n (a 'total digital-product factorial').at n=19A131387For n > 2 , a(n) = a(n-2) + lcm(a(n-2), n-1) with a(1)=2, a(2)=2.at n=23A217662a(n) is the number of positive divisors of A003266(n).at n=25A272122