79755701025domain: NAppears in sequencesa(n) = n!/(1!*2!*3!*...*k!) where k is the largest integer such that 1!*2!*3!*...*k! divides n!.at n=25A074199a(n) = (A093886(n))! / (1!*2!*3!*...*n!).at n=7A093887