A127650 - OEIS

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A127650

n^n - (2n-1)!!.

0, 1, 12, 151, 2180, 36261, 688408, 14750191, 352961064, 9345270925, 271562360036, 8599866305031, 294969253011628, 10898548778881141, 431703607027230000, 18254845289747040991, 820907602015573913552, 39124764979819837803549, 1970218861127675697564604

(list; graph; refs; listen; history; text; internal format)

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.

LINKS

Table of n, a(n) for n=1..19.

CROSSREFS

Cf. A001147, A127688.

Sequence in context: A060917 A113358 A015611 * A286432 A189548 A103759

Adjacent sequences: A127647 A127648 A127649 * A127651 A127652 A127653

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 03 2007

STATUS

approved