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A147912 Number of permutations of floor(i*7/4), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique. 0
1, 2, 6, 24, 96, 456, 2134, 11650, 74546, 530962, 3285816, 22665948, 187716490, 1693665742, 13845532508, 121701474366 (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: A147906 A147898 A147890 * A147903 A147895 A070945

Adjacent sequences:  A147909 A147910 A147911 * A147913 A147914 A147915

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified June 24 20:32 EDT 2022. Contains 354830 sequences. (Running on oeis4.)