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A147939
Number of permutations of floor(i*8/3), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
0
1, 2, 6, 24, 96, 376, 2214, 13736, 74156, 544746, 4407076, 31351588, 285115742, 2837535876, 24004174902, 263778523564
OFFSET
1,2
CROSSREFS
Sequence in context: A147935 A147926 A147948 * A147930 A147918 A072855
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved