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A147931
Number of permutations of floor(i*8/7), i=0..n-1, with all sums of two and three adjacent terms respectively unique.
0
1, 2, 6, 16, 54, 232, 936, 5070, 28658, 170392, 1087848, 7171828, 49584912, 366964014, 3450377582, 32284315804
OFFSET
1,2
CROSSREFS
Sequence in context: A147899 A147949 A147940 * A091217 A147891 A147922
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved