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A147894 Number of permutations of floor(i*7/2), i=0..n-1, with all sums of two and three adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 368, 1924, 10912, 67792, 449216, 3401230, 26973896, 240069290, 2230691024, 22675693280, 239723851692 (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: A147909 A147911 A147901 * A147885 A147914 A147905

Adjacent sequences:  A147891 A147892 A147893 * A147895 A147896 A147897

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified November 27 10:45 EST 2021. Contains 349366 sequences. (Running on oeis4.)