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A179263 Number of permutations of 1..n with sum (i-p(i))^2 <= n*(n-1)/2 0
1, 1, 3, 9, 27, 87, 350, 1675, 7848, 36711, 196510, 1177139, 6908609, 40106433, 256572630, 1785661795, 12221831460, 82732094377, 603846490132, 4714585241090, 36290179829390, 276421527541533 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..22.

CROSSREFS

Sequence in context: A176826 A146786 A151029 * A147242 A148924 A113994

Adjacent sequences:  A179260 A179261 A179262 * A179264 A179265 A179266

KEYWORD

nonn

AUTHOR

R. H. Hardin Jul 06 2010

STATUS

approved

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Last modified October 16 01:14 EDT 2019. Contains 328038 sequences. (Running on oeis4.)