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A147950
Number of permutations of floor(i*9/4), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.
0
1, 2, 6, 16, 96, 376, 1924, 10496, 84546, 512596, 3408402, 27126934, 264217136, 2142601474, 18260309986, 185609885490
OFFSET
1,2
CROSSREFS
Sequence in context: A374826 A204436 A135068 * A147941 A147932 A147923
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 17 2008
STATUS
approved