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A147939 Number of permutations of floor(i*8/3), i=0..n-1, with all sums of 2 through 4 adjacent terms respectively unique. 0
1, 2, 6, 24, 96, 376, 2214, 13736, 74156, 544746, 4407076, 31351588, 285115742, 2837535876, 24004174902, 263778523564 (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: A147935 A147926 A147948 * A147930 A147918 A072855

Adjacent sequences:  A147936 A147937 A147938 * A147940 A147941 A147942

KEYWORD

nonn

AUTHOR

R. H. Hardin Nov 17 2008

STATUS

approved

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Last modified October 14 05:08 EDT 2019. Contains 327995 sequences. (Running on oeis4.)