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A147924 Number of permutations of floor(i*9/7), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 16, 74, 304, 1720, 11448, 73544, 556452, 4351440, 39758684, 380173176, 3837917536, 45346283462, 532159158036 (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: A147942 A147933 A147886 * A147908 A147900 A147892

Adjacent sequences:  A147921 A147922 A147923 * A147925 A147926 A147927

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified January 19 21:55 EST 2022. Contains 350466 sequences. (Running on oeis4.)