Number of length-n 0..2 arrays with no repeated value unequal to the previous repeated value plus one mod 2+1.

A268938

Number of length-n 0..2 arrays with no repeated value unequal to the previous repeated value plus one mod 2+1.

Terms

    a(0) =3a(1) =9a(2) =24a(3) =63a(4) =159a(5) =396a(6) =969a(7) =2349a(8) =5640a(9) =13455a(10) =31911a(11) =75348a(12) =177225a(13) =415557a(14) =971808a(15) =2267631a(16) =5281359a(17) =12280860a(18) =28518153a(19) =66147165a(20) =153274488a(21) =354861711a(22) =820976631a(23) =1898144676a(24) =4386240393a(25) =10131006069a(26) =23390390544a(27) =53984735343

External references