A147896 Number of permutations of floor(i*7/6), i=0..n-1, with all sums of two and three adjacent terms respectively unique.

1, 2, 6, 16, 54, 232, 1194, 5850, 32514, 186512, 1126380, 7192530, 59572866, 496249216, 4342242234, 38902467388

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147922 A147913 A147904 * A147888 A147945 A147936

Adjacent sequences: A147893 A147894 A147895 * A147897 A147898 A147899

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved