Number of length n+4 0..2 arrays with at most two downsteps in every 4 consecutive neighbor pairs.
A255618
Number of length n+4 0..2 arrays with at most two downsteps in every 4 consecutive neighbor pairs.
Terms
- a(0) =237a(1) =694a(2) =2040a(3) =5997a(4) =17622a(5) =51768a(6) =152106a(7) =446932a(8) =1313199a(9) =3858468a(10) =11337057a(11) =33310953a(12) =97875387a(13) =287580727a(14) =844979241a(15) =2482746381a(16) =7294888809a(17) =21434086890a(18) =62978352609a(19) =185045107303a(20) =543705739710
External references
- oeis: A255618