A147889 Number of permutations of floor(i*8/5), i=0..n-1, with all sums of two adjacent terms unique.

1, 2, 6, 16, 74, 448, 2418, 13656, 106120, 788328, 7615458, 68903424, 654009926, 7602830768, 82353986258, 1125428610408

Offset

1,2

Links

Table of n, a(n) for n=1..16.

Crossrefs

Sequence in context: A147914 A147905 A147897 * A345246 A137858 A074740

Adjacent sequences: A147886 A147887 A147888 * A147890 A147891 A147892

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved