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A152349
Number of permutations of floor(i*9/8), i=0..n-1, with all sums of 4 adjacent terms unique.
0
1, 2, 6, 24, 120, 608, 3684, 23136, 185772, 1557704, 14531768, 142953580, 1530728460, 17401543208, 210735290068, 2698171998814
OFFSET
1,2
CROSSREFS
Sequence in context: A267385 A060726 A152332 * A152345 A152342 A147735
KEYWORD
nonn
AUTHOR
R. H. Hardin, Dec 02 2008
STATUS
approved