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A147918 Number of permutations of floor(i*5/3), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 24, 96, 376, 2434, 16728, 99960, 838244, 7723320, 62801352, 674514660, 7865976872, 80727212972, 1056425822904 (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: A147948 A147939 A147930 * A072855 A179341 A179345

Adjacent sequences:  A147915 A147916 A147917 * A147919 A147920 A147921

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 17 2008

STATUS

approved

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Last modified October 16 03:34 EDT 2019. Contains 328040 sequences. (Running on oeis4.)