A152378 Number of permutations of floor(i*7/4), i=0..n-1, with all sums of 6 adjacent terms unique.

1, 2, 6, 24, 120, 720, 5040, 37824, 317352, 2904864, 28985856, 318625344, 3752068876, 47528807384, 637960792172, 9188691694700

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152379 A152377 A152382 * A152373 A152381 A152385

Adjacent sequences: A152375 A152376 A152377 * A152379 A152380 A152381

Keyword

nonn

Author

R. H. Hardin, Dec 02 2008

Status

approved