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A179266
Number of permutations of 1..n with sum (i-p(i))^2 < (n+1)*n/2.
1
1, 2, 3, 11, 41, 151, 594, 2667, 13796, 70702, 363135, 2075703, 13050503, 81009240, 499992359, 3350516588, 24169492053, 172363021094, 1219959327412, 9226251521662, 74120163086669
OFFSET
1,2
CROSSREFS
Cf. A179264.
Sequence in context: A249402 A046224 A081173 * A265779 A055692 A051075
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 06 2010
STATUS
approved