A147945 Number of permutations of floor(i*6/5), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.

1, 2, 6, 16, 54, 260, 1236, 6360, 31636, 159064, 1028418, 6241800, 40763772, 268393912, 1814067010, 14763664426

Offset

1,2

Links

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

Crossrefs

Sequence in context: A147904 A147896 A147888 * A147936 A147927 A147919

Adjacent sequences: A147942 A147943 A147944 * A147946 A147947 A147948

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved