A152333 Number of permutations of floor(i*3/2), i=0..n-1, with all sums of 4 adjacent terms unique.

1, 2, 6, 24, 120, 640, 4092, 27504, 223752, 1941032, 18688776, 193458120, 2192678402, 26386639934, 341945010834, 4673722974460

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152338 A152348 A152334 * A152335 A152339 A152341

Adjacent sequences: A152330 A152331 A152332 * A152334 A152335 A152336

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved