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A147951 Number of permutations of floor(i*9/7), i=0..n-1, with all sums of 2 through 5 adjacent terms respectively unique. 0
1, 2, 6, 16, 74, 304, 1424, 7946, 39908, 223514, 1294348, 8736910, 58707788, 401926462, 3287231046, 25868828516 (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: A147910 A147902 A147893 * A147942 A147933 A147886

Adjacent sequences:  A147948 A147949 A147950 * A147952 A147953 A147954

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 17 2008

STATUS

approved

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Last modified January 21 18:11 EST 2022. Contains 350479 sequences. (Running on oeis4.)