A152321 Number of permutations of floor(i*7/3), i=0..n-1, with all sums of 3 adjacent terms unique.

1, 2, 6, 24, 104, 572, 3708, 26080, 203656, 1891158, 17801198, 187809048, 2197262096, 25480703902, 331576359352, 4786283287650

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152319 A152315 A152317 * A152323 A337770 A171338

Adjacent sequences: A152318 A152319 A152320 * A152322 A152323 A152324

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved