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A147887 Number of permutations of floor(i*7/4), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 24, 96, 528, 2418, 14676, 109882, 996240, 7675118, 67181516, 718155492, 8798220008, 93512144280, 1080953807952 (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: A152314 A152331 A152324 * A053502 A053504 A215716

Adjacent sequences:  A147884 A147885 A147886 * A147888 A147889 A147890

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified January 25 16:01 EST 2022. Contains 350572 sequences. (Running on oeis4.)