Number of length n+2 0..3 arrays with the medians of every three consecutive terms nondecreasing.
A250135
Number of length n+2 0..3 arrays with the medians of every three consecutive terms nondecreasing.
Terms
- a(0) =64a(1) =204a(2) =632a(3) =1959a(4) =5696a(5) =16104a(6) =45232a(7) =124249a(8) =335328a(9) =897523a(10) =2377452a(11) =6233295a(12) =16229424a(13) =41987965a(14) =107948004a(15) =276101588a(16) =703049528a(17) =1782693579a(18) =4503485124a(19) =11339512465a(20) =28466148864a(21) =71263715430a(22) =177963467480a(23) =443410709998
External references
- oeis: A250135