A147950 Number of permutations of floor(i*9/4), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique.

1, 2, 6, 16, 96, 376, 1924, 10496, 84546, 512596, 3408402, 27126934, 264217136, 2142601474, 18260309986, 185609885490

Offset

1,2

Links

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

Crossrefs

Sequence in context: A374826 A204436 A135068 * A147941 A147932 A147923

Adjacent sequences: A147947 A147948 A147949 * A147951 A147952 A147953

Keyword

nonn

Author

R. H. Hardin, Nov 17 2008

Status

approved