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A147940
Number of permutations of floor(i*8/7), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique.
0
1, 2, 6, 16, 54, 232, 936, 5070, 25700, 144538, 829398, 4949114, 30028194, 195791072, 1612860652, 13023036794
OFFSET
1,2
CROSSREFS
Sequence in context: A147634 A147899 A147949 * A147931 A091217 A147891
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved