Number of length-n 0..2 arrays with no repeated value equal to the previous repeated value.

A269461

Number of length-n 0..2 arrays with no repeated value equal to the previous repeated value.

Terms

    a(0) =3a(1) =9a(2) =24a(3) =66a(4) =174a(5) =462a(6) =1206a(7) =3150a(8) =8166a(9) =21150a(10) =54582a(11) =140718a(12) =362118a(13) =931134a(14) =2391894a(15) =6141006a(16) =15757734a(17) =40420062a(18) =103647606a(19) =265721070a(20) =681097926a(21) =1745555070a(22) =4473092502a(23) =11461604238a(24) =29366557158a(25) =75238139934a(26) =192754700214

External references