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
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 03 2007
STATUS
approved