Number of length n+2 0..5 arrays with no three equal elements in a row and new values 0..5 introduced in 0..5 order.

A242468

Number of length n+2 0..5 arrays with no three equal elements in a row and new values 0..5 introduced in 0..5 order.

Terms

    a(0) =4a(1) =12a(2) =41a(3) =159a(4) =684a(5) =3204a(6) =16042a(7) =84412a(8) =460174a(9) =2570411a(10) =14593499a(11) =83749169a(12) =484000704a(13) =2809880001a(14) =16360962717a(15) =95445840289a(16) =557493277222

External references