A152336 Number of permutations of floor(i*5/3), i=0..n-1, with all sums of 4 adjacent terms unique.

1, 2, 6, 24, 120, 656, 4176, 28560, 238088, 2140096, 20376580, 212273600, 2459680252, 29962370234, 389875701826, 5501437371836

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152339 A152341 A152346 * A152343 A177529 A138619

Adjacent sequences: A152333 A152334 A152335 * A152337 A152338 A152339

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved