Number of arrays of length n that are sums of 2 consecutive elements of length n+1 permutations of 0..n, and no two consecutive rises or falls in the latter permutation.
A229712
Number of arrays of length n that are sums of 2 consecutive elements of length n+1 permutations of 0..n, and no two consecutive rises or falls in the latter permutation.
Terms
- a(0) =1a(1) =4a(2) =6a(3) =32a(4) =86a(5) =544a(6) =2194a(7) =15872a(8) =86642a(9) =707584a(10) =4887130a(11) =44736512a(12) =373320362a(13) =3807514624a(14) =37157321890
External references
- oeis: A229712