Number of length n+6 0..3 arrays with at most one downstep in every 6 consecutive neighbor pairs.

A258728

Number of length n+6 0..3 arrays with at most one downstep in every 6 consecutive neighbor pairs.

Terms

    a(0) =2592a(1) =5664a(2) =13720a(3) =35704a(4) =92548a(5) =228081a(6) =526672a(7) =1183616a(8) =2727288a(9) =6597449a(10) =16454876a(11) =40863000a(12) =98379104a(13) =230053160a(14) =534172704a(15) =1260245516a(16) =3043544240a(17) =7443617220a(18) =18093595536a(19) =43272115712a(20) =102190186552a(21) =241107878575

External references