A152630 Number of permutations of floor(i*4/3), i=0..n-1, with all sums of 7 adjacent terms unique.

1, 2, 6, 24, 120, 720, 5040, 40320, 339840, 3110688, 30764160, 327951296, 3794950176, 48149991440, 637721090592, 9061459001832

Offset

1,2

Links

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

Crossrefs

Sequence in context: A152634 A152633 A152646 * A152629 A152631 A152635

Adjacent sequences: A152627 A152628 A152629 * A152631 A152632 A152633

Keyword

nonn

Author

R. H. Hardin, Dec 10 2008

Status

approved