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A147905 Number of permutations of floor(i*8/5), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 384, 1970, 10282, 65472, 408096, 3135626, 22226326, 167840010, 1477742556, 12643496462, 132500787090 (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: A147894 A147885 A147914 * A147897 A147889 A345246

Adjacent sequences:  A147902 A147903 A147904 * A147906 A147907 A147908

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified October 27 13:45 EDT 2021. Contains 348276 sequences. (Running on oeis4.)