A152330 Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 3 adjacent terms unique.

1, 2, 6, 24, 104, 572, 3188, 20956, 161600, 1295136, 11618224, 116270992, 1227612062, 13832165114, 168852764168, 2197057423482

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152316 A177520 A152326 * A152319 A152315 A152317

Adjacent sequences: A152327 A152328 A152329 * A152331 A152332 A152333

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved