A147908 Number of permutations of floor(i*3/2), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.

1, 2, 6, 16, 74, 368, 1776, 9208, 53466, 314212, 2033052, 13601690, 101992918, 775253990, 6502888210, 55177455836

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147933 A147886 A147924 * A147900 A147892 A147909

Adjacent sequences: A147905 A147906 A147907 * A147909 A147910 A147911

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved