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A152646
Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 7 adjacent terms unique.
0
1, 2, 6, 24, 120, 720, 5040, 40320, 339840, 3087648, 30271392, 324759072, 3731733312, 46734640160, 618773953544, 8801281435864
OFFSET
1,2
CROSSREFS
Sequence in context: A152639 A152634 A152633 * A152630 A152629 A152631
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2008
STATUS
approved