Number of length n+5 0..3 arrays with at most one downstep in every 5 consecutive neighbor pairs.

A258727

Number of length n+5 0..3 arrays with at most one downstep in every 5 consecutive neighbor pairs.

Terms

    a(0) =1212a(1) =2936a(2) =7834a(3) =21860a(4) =59188a(5) =149960a(6) =370510a(7) =941024a(8) =2487276a(9) =6650600a(10) =17371025a(11) =44270908a(12) =112541478a(13) =290771496a(14) =762899717a(15) =1998910152a(16) =5175319416a(17) =13289503784a(18) =34202437664a(19) =88756842476a(20) =231356200114a(21) =601422231744

External references