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A147910 Number of permutations of floor(i*5/4), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 304, 1424, 6554, 36720, 207648, 1210892, 7147234, 50179090, 352778422, 2561140390, 18798019730 (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: A009346 A009367 A114249 * A147902 A147893 A147951

Adjacent sequences:  A147907 A147908 A147909 * A147911 A147912 A147913

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified January 22 05:19 EST 2022. Contains 350481 sequences. (Running on oeis4.)