55185domain: NAppears in sequencesSmooth Lyndon words with 4 colors.at n=13A215330Minimum number of moves to rearrange a Tower of Hanoi puzzle with 3 colors. There are 3 rods with n discs in descending sizes. On the first rod there are n red discs, on the 2nd n blue discs and on the 3rd n white ones.at n=11A290187