A147914 Number of permutations of floor(i*8/5), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.

1, 2, 6, 16, 74, 384, 1970, 10282, 65472, 391386, 2939090, 20208896, 147099900, 1225118562, 9901118700, 97592995386

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147901 A147894 A147885 * A147905 A147897 A147889

Adjacent sequences: A147911 A147912 A147913 * A147915 A147916 A147917

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved