Number of length n+5 0..2 arrays with at most two downsteps in every n consecutive neighbor pairs.

A255627

Number of length n+5 0..2 arrays with at most two downsteps in every n consecutive neighbor pairs.

Terms

    a(0) =729a(1) =2187a(2) =6561a(3) =17622a(4) =40659a(5) =83325a(6) =156563a(7) =275166a(8) =458604a(9) =731981a(10) =1127139a(11) =1683927a(12) =2451654a(13) =3490746a(14) =4874628a(15) =6691853a(16) =9048501a(17) =12070872a(18) =15908498a(19) =20737500a(20) =26764317a(21) =34229835a(22) =43413945a(23) =54640560a(24) =68283122a(25) =84770631

External references