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A147890 Number of permutations of floor(i*9/5), i=0..n-1, with all sums of two adjacent terms unique. 0
1, 2, 6, 24, 96, 444, 3172, 16976, 112790, 839320, 7525858, 86947336, 816752748, 8170308628, 90956874778, 1199823762964 (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: A147915 A147906 A147898 * A147912 A147903 A147895

Adjacent sequences:  A147887 A147888 A147889 * A147891 A147892 A147893

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified June 27 09:26 EDT 2022. Contains 354893 sequences. (Running on oeis4.)