A147729 Number of permutations of 1..n with all sums of 2 through 7 adjacent terms respectively unique.

1, 2, 6, 16, 54, 232, 936, 3880, 17302, 81584, 409012, 2138674, 11754832, 66857094, 395646912, 2421309886, 15276353934

Offset

1,2

Links

Table of n, a(n) for n=1..17.

Crossrefs

Sequence in context: A045696 A150028 A147730 * A147728 A147727 A147726

Adjacent sequences: A147726 A147727 A147728 * A147730 A147731 A147732

Keyword

nonn

Author

R. H. Hardin, Nov 11 2008

Status

approved