A147888 Number of permutations of floor(i*7/6), i=0..n-1, with all sums of two adjacent terms unique.

1, 2, 6, 16, 54, 232, 1426, 8308, 57150, 397720, 3031266, 24524008, 246278170, 2524773072, 27494109560, 308909489620

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147913 A147904 A147896 * A147945 A147936 A147927

Adjacent sequences: A147885 A147886 A147887 * A147889 A147890 A147891

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved