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!)
A138880 Sum of all parts of all partitions of n that do not contain 1 as a part. 19
0, 2, 3, 8, 10, 24, 28, 56, 72, 120, 154, 252, 312, 476, 615, 880, 1122, 1584, 1995, 2740, 3465, 4620, 5819, 7680, 9575, 12428, 15498, 19824, 24563, 31170, 38378, 48224, 59202, 73678, 90055, 111384, 135420, 166364, 201630, 246120, 297045, 360822 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Sum of all parts > 1 of the last section of the set of partitions of n.

Row sums of triangle A182710. Also row sums of other similar triangles as A138136 and A182711.

Partial sums give A194552. - Omar E. Pol, Sep 23 2013

LINKS

Table of n, a(n) for n=1..42.

FORMULA

a(n) = A002865(n)*n = (A000041(n) - A000041(n-1))*n = A138879(n) - A000041(n-1).

a(n) ~ Pi^2/6*A000070(n-2). - Peter Bala, Dec 23 2013

CROSSREFS

Cf. A000041, A002865, A066186, A133041, A138135, A138136, A138137, A138138, A138151, A138879, A139100.

Sequence in context: A098844 A034437 A175715 * A063474 A163492 A025562

Adjacent sequences:  A138877 A138878 A138879 * A138881 A138882 A138883

KEYWORD

nonn

AUTHOR

Omar E. Pol, Apr 30 2008

EXTENSIONS

Better definition from Omar E. Pol, Sep 23 2013

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 21 02:15 EST 2014. Contains 252291 sequences.