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A147891
Number of permutations of floor(i*9/8), i=0..n-1, with all sums of two adjacent terms unique.
0
1, 2, 6, 16, 54, 232, 1132, 6024, 45310, 336372, 2763524, 23390652, 212922998, 2023344980, 20591028914, 219965702000
OFFSET
1,2
CROSSREFS
Sequence in context: A147940 A147931 A091217 * A147922 A147913 A147904
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved