A147947 Number of permutations of floor(i*7/5), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.

1, 2, 6, 24, 74, 372, 1764, 9076, 51988, 292392, 1967338, 12930510, 91859738, 702084750, 5271114798, 46825411464

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147937 A147928 A147920 * A147938 A147929 A147921

Adjacent sequences: A147944 A147945 A147946 * A147948 A147949 A147950

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved