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A147909 Number of permutations of floor(i*5/2), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 368, 1924, 10496, 65446, 426596, 3048508, 22901328, 189677816, 1628971852, 15211951462, 146663420606 (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: A147908 A147900 A147892 * A147911 A147901 A147894

Adjacent sequences:  A147906 A147907 A147908 * A147910 A147911 A147912

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified January 22 07:31 EST 2022. Contains 350481 sequences. (Running on oeis4.)