AUTHOR
_N. J. A. Sloane (njas(AT)research.att.com), _, Apr 03 2007
_N. J. A. Sloane (njas(AT)research.att.com), _, Apr 03 2007
nonn,new
nonn
N. J. A. Sloane (njas, (AT)research.att.com), Apr 03 2007
n^n - (2n-1)!!.
0, 1, 12, 151, 2180, 36261, 688408, 14750191, 352961064, 9345270925, 271562360036, 8599866305031, 294969253011628, 10898548778881141, 431703607027230000, 18254845289747040991, 820907602015573913552, 39124764979819837803549, 1970218861127675697564604
1,3
Theorem: n^n > (2n-1)!! for n>1.
D. S. Mitrinovic, Analytic Inequalities, Springer-Verlag, 1970; p. 192, 3.1.15.
nonn
njas, Apr 03 2007
approved