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A179265
Number of permutations of 1..n with sum (i-p(i))^2 < n*(n-1)/2
0
0, 1, 3, 5, 21, 87, 350, 1399, 6689, 36711, 196510, 1037354, 6147299, 40106433, 256572630, 1621282565, 11156001505, 82732094377, 603846490132, 4357719350552, 33658109397606, 276421527541533
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OFFSET
1,3
LINKS
Table of n, a(n) for n=1..22.
CROSSREFS
Sequence in context:
A189560
A216385
A247680
*
A084253
A153889
A364576
Adjacent sequences:
A179262
A179263
A179264
*
A179266
A179267
A179268
KEYWORD
nonn
AUTHOR
R. H. Hardin
Jul 06 2010
STATUS
approved
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Last modified September 15 04:39 EDT 2024. Contains 375931 sequences. (Running on oeis4.)