Number of 0..4 arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.
A200834
Number of 0..4 arrays x(0..n+1) of n+2 elements without any two consecutive increases or two consecutive decreases.
Terms
- a(0) =105a(1) =435a(2) =1817a(3) =7587a(4) =31677a(5) =132263a(6) =552247a(7) =2305835a(8) =9627715a(9) =40199277a(10) =167846875a(11) =700822891a(12) =2926195229a(13) =12217949255a(14) =51014464969a(15) =213004292437a(16) =889371840403
External references
- oeis: A200834