A152338 Number of permutations of floor(i*6/5), i=0..n-1, with all sums of 4 adjacent terms unique.

1, 2, 6, 24, 120, 640, 3924, 27552, 197364, 1677640, 16002846, 159888834, 1733332410, 19754032288, 242687959560, 3279596665638

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147732 A147731 A152337 * A152348 A152334 A152333

Adjacent sequences: A152335 A152336 A152337 * A152339 A152340 A152341

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved