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A147950 Number of permutations of floor(i*9/4), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique. 0
1, 2, 6, 16, 96, 376, 1924, 10496, 84546, 512596, 3408402, 27126934, 264217136, 2142601474, 18260309986, 185609885490 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

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

CROSSREFS

Sequence in context: A074740 A204436 A135068 * A147941 A147932 A147923

Adjacent sequences:  A147947 A147948 A147949 * A147951 A147952 A147953

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)