1112212domain: NAppears in sequencesList of Lyndon words on {1,2} sorted first by length and then lexicographically.at n=29A102659Numbers that eventually reach 1 under "x -> sum of 5th power of digits of x".at n=9A219112List of minimal palindromic words over {1,2} that begin with 1, and have lengths 1, 2, 3, ....at n=13A225189