Number of length n+2 0..4 arrays with the medians of every three consecutive terms nondecreasing.
A250136
Number of length n+2 0..4 arrays with the medians of every three consecutive terms nondecreasing.
Terms
- a(0) =125a(1) =485a(2) =1827a(3) =6902a(4) =24125a(5) =81664a(6) =274901a(7) =899306a(8) =2878124a(9) =9128858a(10) =28568459a(11) =88203357a(12) =270034170a(13) =819921694a(14) =2468386488a(15) =7381269147a(16) =21942189228a(17) =64848568804a(18) =190676777475a(19) =558132331487
External references
- oeis: A250136