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A152644 Number of permutations of floor(i*9/4), i=0..n-1, with all sums of 7 adjacent terms unique. 0
1, 2, 6, 24, 120, 720, 5040, 40320, 343680, 3210336, 32428512, 359501856, 4409024192, 56394389456, 777561149096, 11557514999280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Sequence in context: A152632 A152640 A152641 * A152637 A152645 A054873

Adjacent sequences:  A152641 A152642 A152643 * A152645 A152646 A152647

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 10 2008

STATUS

approved

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Last modified July 30 15:29 EDT 2021. Contains 346359 sequences. (Running on oeis4.)