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A147885 Number of permutations of floor(i*5/2), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 16, 74, 368, 2016, 12168, 85462, 646544, 5510236, 49722456, 500178548, 5288883744, 60900708056, 733070993472 (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: A147911 A147901 A147894 * A147914 A147905 A147897

Adjacent sequences:  A147882 A147883 A147884 * A147886 A147887 A147888

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified November 27 09:19 EST 2021. Contains 349365 sequences. (Running on oeis4.)