login
This site is supported by donations to The OEIS Foundation.

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A127634 3^(n-1) - ceiling(n^n/n!). 0
0, 1, 4, 16, 54, 178, 565, 1770, 5493, 16927, 51901, 158533, 482802, 1466859, 4448104, 13467249, 40720970, 122994566, 371156622, 1119161662, 3372427789, 10156591942, 30573367574, 91993546765, 276703494365, 832023918335, 2501142914874, 7516883840470 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

COMMENTS

Theorem: 3^(n-1) > n^n/n! for n >= 3.

REFERENCES

D. S. Mitrinovic, Analytic Inequalities, Springer-Verlag, 1970; p. 193, 3.1.21.

LINKS

Table of n, a(n) for n=1..28.

CROSSREFS

Sequence in context: A134968 A238419 A223944 * A212520 A115108 A127393

Adjacent sequences:  A127631 A127632 A127633 * A127635 A127636 A127637

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Apr 03 2007

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified December 18 22:55 EST 2014. Contains 252174 sequences.