21069103104domain: NAppears in sequencesa(n) = A056623(n!).at n=17A056628a(n) = A056623(n!).at n=18A056628a(0)=1; a(n) is the smallest positive integer such that lcm(a(n-1), a(n)) = n!.at n=18A129108Largest unitary square divisor of n!.at n=18A374988Largest unitary square divisor of n!.at n=19A374988