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A147930
Number of permutations of floor(i*8/3), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
0
1, 2, 6, 24, 96, 376, 2214, 14504, 76592, 578748, 4897972, 35873520, 341266768, 3588847880, 32029981504, 372805397466
OFFSET
1,2
CROSSREFS
Sequence in context: A147926 A147948 A147939 * A147918 A072855 A179341
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved