Number of length n+3 0..3 arrays with at most one downstep in every 3 consecutive neighbor pairs.
A258725
Number of length n+3 0..3 arrays with at most one downstep in every 3 consecutive neighbor pairs.
Terms
- a(0) =190a(1) =608a(2) =2028a(3) =6552a(4) =20955a(5) =68120a(6) =220854a(7) =711432a(8) =2300008a(9) =7446144a(10) =24054120a(11) =77722752a(12) =251353605a(13) =812507404a(14) =2625900876a(15) =8488906820a(16) =27442096806a(17) =88701621392a(18) =286727659260a(19) =926874621576
External references
- oeis: A258725