A147921 Number of permutations of floor(i*7/5), i=0..n-1, with all sums of two adjacent terms unique.

1, 2, 6, 24, 74, 372, 2116, 13376, 91944, 651888, 5780164, 51776784, 517517604, 5477813312, 59576133472, 755631632616

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147947 A147938 A147929 * A263712 A263698 A263747

Adjacent sequences: A147918 A147919 A147920 * A147922 A147923 A147924

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved