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

A255658

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

Terms

    a(0) =10320a(1) =33042a(2) =112196a(3) =385738a(4) =1324872a(5) =4542671a(6) =15269184a(7) =50963540a(8) =171784096a(9) =583245999a(10) =1978627688a(11) =6707590534a(12) =22709921860a(13) =76722468914a(14) =259180579024a(15) =877068284264

External references