176801domain: NAppears in sequencesa(1)=1, a(n)=ceiling(n*(a(n-1)+3/a(n-1))).at n=7A082573A246314(2^n-1).at n=8A246315a(n) is the smallest nonnegative integer such that a(n)! contains a string of exactly n consecutive 9's.at n=12A254717Total number of parts in all plane partitions of n.at n=17A319648