Number of length n+4 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.

A255664

Number of length n+4 0..3 arrays with at most two downsteps in every n consecutive neighbor pairs.

Terms

    a(0) =1024a(1) =4096a(2) =16128a(3) =54560a(4) =155144a(5) =385738a(6) =864924a(7) =1788660a(8) =3467296a(9) =6376160a(10) =11223728a(11) =19042353a(12) =31307660a(13) =50094036a(14) =78275176a(15) =119780409a(16) =179919544a(17) =265791268a(18) =386792720a(19) =555250782a(20) =787198896a(21) =1103326862a(22) =1530135124

External references