A147923 Number of permutations of floor(i*9/4), i=0..n-1, with all sums of two adjacent terms unique.

1, 2, 6, 16, 96, 376, 2016, 12168, 109882, 783536, 6232926, 59671520, 718155492, 7173976288, 76938806480, 981871005232

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147950 A147941 A147932 * A341838 A325790 A144690

Adjacent sequences: A147920 A147921 A147922 * A147924 A147925 A147926

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved