Number of length-n 0..2 arrays with no repeated value differing from the previous repeated value by more than one.

A269578

Number of length-n 0..2 arrays with no repeated value differing from the previous repeated value by more than one.

Terms

    a(0) =3a(1) =9a(2) =27a(3) =79a(4) =229a(5) =659a(6) =1889a(7) =5401a(8) =15419a(9) =43977a(10) =125355a(11) =357191a(12) =1017565a(13) =2898435a(14) =8255201a(15) =23510865a(16) =66956883a(17) =190683433a(18) =543031707a(19) =1546443295a(20) =4403932917a(21) =12541401683a(22) =35714999425a(23) =101707905961a(24) =289639951179a(25) =824825396777

External references