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A147926 Number of permutations of floor(i*5/3), i=0..n-1, with all sums of two and three adjacent terms respectively unique. 0
1, 2, 6, 24, 96, 376, 2062, 12860, 69210, 499610, 3976470, 29600486, 270810736, 2683748296, 24357907464, 272243917696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Sequence in context: A072854 A147944 A147935 * A147948 A147939 A147930

Adjacent sequences:  A147923 A147924 A147925 * A147927 A147928 A147929

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified June 26 04:00 EDT 2022. Contains 354874 sequences. (Running on oeis4.)