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A170814 Number of permutations of 1..n with all differences of elements separated by distances 1 through 8 being respectively unique. 0
1, 2, 4, 12, 40, 116, 200, 444, 760, 2160, 4368, 7852, 12828, 17252, 19612, 21104, 18276, 15096, 11052, 8484, 6400, 5360 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
(Empirical) Equals A008404 for n<=2m+2, where m is the maximum difference separation 8.
LINKS
CROSSREFS
Sequence in context: A000940 A008404 A170815 * A170813 A170812 A170811
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 02 2009
STATUS
approved

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Last modified February 26 14:00 EST 2024. Contains 370352 sequences. (Running on oeis4.)