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

A255665

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

Terms

    a(0) =4096a(1) =16384a(2) =64257a(3) =209412a(4) =564600a(5) =1324872a(6) =2816673a(7) =5555336a(8) =10323148a(9) =18270784a(10) =31047630a(11) =50967648a(12) =81218758a(13) =126125244a(14) =191474454a(15) =284921080a(16) =416484596a(17) =599158024a(18) =849649115a(19) =1189278300a(20) =1645061412a(21) =2251009232

External references