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A147898
Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
0
1, 2, 6, 24, 96, 444, 2508, 13216, 81030, 566512, 4383340, 43168552, 356745786, 3125719866, 30567653042, 349720370632
OFFSET
1,2
CROSSREFS
Sequence in context: A323260 A147915 A147906 * A147890 A147912 A147903
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved