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.

1, 4, 6, 32, 86, 544, 2194, 15872, 86642, 707584, 4887130, 44736512, 373320362, 3807514624, 37157321890

Offset

1,2

Comments

Column 2 of A229717.

Links

Table of n, a(n) for n=1..15.

Example

Some solutions for n=4:
  3  7  2  2  4  4  6  3  5  3  5  5  4  7  4  6
  2  4  4  3  3  2  4  5  6  2  3  6  5  5  5  5
  3  2  5  5  4  3  3  4  5  4  4  4  6  3  4  4
  5  3  4  7  3  4  4  3  3  7  5  1  4  2  5  3

Crossrefs

Sequence in context: A078250 A239224 A087299 * A331513 A164127 A180139

Adjacent sequences: A229709 A229710 A229711 * A229713 A229714 A229715

Keyword

nonn,more

Author

R. H. Hardin, Sep 27 2013

Status

approved