A147927 Number of permutations of floor(i*6/5), i=0..n-1, with all sums of two and three adjacent terms respectively unique.

1, 2, 6, 16, 54, 260, 1236, 6360, 34730, 192782, 1393166, 9882056, 75731318, 596396100, 4939024062, 49565770888

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147888 A147945 A147936 * A147919 A320805 A354083

Adjacent sequences: A147924 A147925 A147926 * A147928 A147929 A147930

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved