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A127650
n^n - (2n-1)!!.
1
0, 1, 12, 151, 2180, 36261, 688408, 14750191, 352961064, 9345270925, 271562360036, 8599866305031, 294969253011628, 10898548778881141, 431703607027230000, 18254845289747040991, 820907602015573913552, 39124764979819837803549, 1970218861127675697564604
OFFSET
1,3
COMMENTS
Theorem: n^n > (2n-1)!! for n>1.
REFERENCES
D. S. Mitrinovic, Analytic Inequalities, Springer-Verlag, 1970; p. 192, 3.1.15.
CROSSREFS
Sequence in context: A060917 A113358 A015611 * A286432 A189548 A103759
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 03 2007
STATUS
approved