A152340 Number of permutations of floor(i*7/4), i=0..n-1, with all sums of 4 adjacent terms unique.

1, 2, 6, 24, 120, 672, 4260, 29280, 242724, 2159176, 20864844, 223065582, 2583122958, 31759066828, 413564101194, 5777537336826

Offset

1,2

Links

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

Crossrefs

Sequence in context: A189841 A189256 A152344 * A152347 A228393 A177526

Adjacent sequences: A152337 A152338 A152339 * A152341 A152342 A152343

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved