Number of length n+2 0..2 arrays with the medians of every three consecutive terms nondecreasing.

A250134

Number of length n+2 0..2 arrays with the medians of every three consecutive terms nondecreasing.

Terms

    a(0) =27a(1) =67a(2) =162a(3) =391a(4) =900a(5) =2026a(6) =4530a(7) =9975a(8) =21694a(9) =46871a(10) =100571a(11) =214396a(12) =454934a(13) =961550a(14) =2025038a(15) =4252314a(16) =8907731a(17) =18620476a(18) =38854077a(19) =80952643a(20) =168448929a(21) =350130660a(22) =727093383a(23) =1508720630a(24) =3128504906a(25) =6483632727a(26) =13430463741

External references