A147911 Number of permutations of floor(i*7/2), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.

1, 2, 6, 16, 74, 368, 1924, 10496, 65446, 426596, 3063568, 23111856, 192313168, 1659439736, 15571466308, 150999440500

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147900 A147892 A147909 * A147901 A147894 A147885

Adjacent sequences: A147908 A147909 A147910 * A147912 A147913 A147914

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved