login
A152647
Number of permutations of floor(i*9/8), i=0..n-1, with all sums of 7 adjacent terms unique.
0
1, 2, 6, 24, 120, 720, 5040, 40320, 333120, 2999520, 29019168, 304642176, 3429800416, 42313568736, 541641897320, 7507122835968
OFFSET
1,2
CROSSREFS
Sequence in context: A179367 A267388 A152628 * A152642 A152639 A152634
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 10 2008
STATUS
approved