Number of arrays of length n that are sums of 3 consecutive elements of length n+2 permutations of 0..n+1, and no two consecutive rises or falls in the latter permutation.
A229713
Number of arrays of length n that are sums of 3 consecutive elements of length n+2 permutations of 0..n+1, and no two consecutive rises or falls in the latter permutation.
Terms
- a(0) =1a(1) =8a(2) =28a(3) =82a(4) =500a(5) =2740a(6) =15040a(7) =100630a(8) =704000a(9) =5310960a(10) =44616536
External references
- oeis: A229713