

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.


0



1, 8, 28, 82, 500, 2740, 15040, 100630, 704000, 5310960, 44616536
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OFFSET

1,2


COMMENTS



LINKS



EXAMPLE

Some solutions for n=4:
8 9 3 12 6 6 10 8 8 9 10 8 8 9 7 6
12 8 8 9 11 9 9 6 9 12 12 9 3 11 6 7
8 11 9 8 8 6 4 10 4 8 7 12 6 7 10 4
7 6 12 3 9 9 5 7 7 6 5 7 7 6 8 9


CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



