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A152337
Number of permutations of floor(i*5/4), i=0..n-1, with all sums of 4 adjacent terms unique.
0
1, 2, 6, 24, 120, 640, 3924, 25536, 205708, 1739900, 16259796, 161820114, 1804403590, 21159038910, 264205593296, 3464634505962
OFFSET
1,2
CROSSREFS
Sequence in context: A147733 A147732 A147731 * A152338 A152348 A152334
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2008
STATUS
approved