Number of length n+2 0..8 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..8 introduced in 0..8 order.

A243727

Number of length n+2 0..8 arrays with no three unequal elements in a row and no three equal elements in a row and new values 0..8 introduced in 0..8 order.

Terms

    a(0) =3a(1) =6a(2) =12a(3) =25a(4) =53a(5) =116a(6) =259a(7) =594a(8) =1389a(9) =3323a(10) =8095a(11) =20113a(12) =50814a(13) =130632a(14) =341034a(15) =904330a(16) =2432401a(17) =6636002a(18) =18344597a(19) =51376058a(20) =145658087a(21) =417937885a(22) =1212891031a(23) =3558923683a(24) =10552653608a(25) =31606799640a(26) =95575235380a(27) =291651970212

External references