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A147897 Number of permutations of floor(i*8/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 384, 1970, 10998, 71488, 465816, 3856840, 30115550, 249292568, 2424016580, 22710804768, 264711365708 (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: A147885 A147914 A147905 * A147889 A345246 A137858

Adjacent sequences:  A147894 A147895 A147896 * A147898 A147899 A147900

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified October 19 09:36 EDT 2021. Contains 348074 sequences. (Running on oeis4.)