OFFSET
0,4
COMMENTS
Theorem: (2*n+1)^n-(2*n-1)^n-(2*n)^n > 0 for n >= 3.
REFERENCES
D. S. Mitrinovic, Analytic Inequalities, Springer-Verlag, 1970; p. 192, 3.1.13.
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Apr 03 2007
STATUS
approved