Number of length n+6 0..2 arrays with at most two downsteps in every n consecutive neighbor pairs.

A255628

Number of length n+6 0..2 arrays with at most two downsteps in every n consecutive neighbor pairs.

Terms

    a(0) =2187a(1) =6561a(2) =19683a(3) =51768a(4) =114546a(5) =225253a(6) =405687a(7) =685713a(8) =1103630a(9) =1707576a(10) =2557098a(11) =3724906a(12) =5298831a(13) =7384008a(14) =10105306a(15) =13610028a(16) =18070905a(17) =23689409a(18) =30699411a(19) =39371211a(20) =50015968a(21) =62990559a(22) =78702897a(23) =97617739a(24) =120263016

External references