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A179266
Number of permutations p of 1..n with sum (i-p(i))^2 < (n+1)*n/2.
2
0, 1, 2, 3, 11, 41, 151, 594, 2667, 13796, 70702, 363135, 2075703, 13050503, 81009240, 499992359, 3350516588, 24169492053, 172363021094, 1219959327412, 9226251521662, 74120163086669, 589195649039233, 4646883194485842, 38743069827428300, 340030369875385469
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..25.
CROSSREFS
Cf. A175929, A179264.
Sequence in context: A249402 A046224 A081173 * A265779 A055692 A051075
Adjacent sequences: A179263 A179264 A179265 * A179267 A179268 A179269
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 06 2010
EXTENSIONS
a(0)=0 prepended by Alois P. Heinz, Dec 11 2025
a(22)-a(25) from Alois P. Heinz, Dec 19 2025
STATUS
approved

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Last modified May 21 15:15 EDT 2026. Contains 395798 sequences.
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