A152346 Number of permutations of floor(i*9/4), i=0..n-1, with all sums of 4 adjacent terms unique.

1, 2, 6, 24, 120, 656, 4164, 28224, 251112, 2247112, 22139418, 238166610, 2898840092, 35687196476, 470211978260, 6746749956094

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152335 A152339 A152341 * A152336 A152343 A177529

Adjacent sequences: A152343 A152344 A152345 * A152347 A152348 A152349

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved