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A147889 Number of permutations of floor(i*8/5), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 16, 74, 448, 2418, 13656, 106120, 788328, 7615458, 68903424, 654009926, 7602830768, 82353986258, 1125428610408 (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: A147914 A147905 A147897 * A345246 A137858 A074740

Adjacent sequences:  A147886 A147887 A147888 * A147890 A147891 A147892

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified October 22 10:29 EDT 2021. Contains 348160 sequences. (Running on oeis4.)