A147920 Number of permutations of floor(i*7/3), i=0..n-1, with all sums of two adjacent terms unique.

1, 2, 6, 24, 74, 368, 2434, 12876, 95120, 838244, 6232926, 59671520, 674514660, 6450680100, 77573342320, 1056425822904

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147946 A147937 A147928 * A147947 A147938 A147929

Adjacent sequences: A147917 A147918 A147919 * A147921 A147922 A147923

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved