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

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A173468 Sum n^k, k=0..n+1. 1
3, 15, 121, 1365, 19531, 335923, 6725601, 153391689, 3922632451, 111111111111, 3452271214393, 116719860413533, 4265491084507563, 167534872139182395, 7037580381120954241, 314824432191309680913, 14942027230321957802947 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

1^0+1^1+1^2=3, 2^0+2^1+2^2+2^3=15, 3^0+3^1+3^2+3^3+3^4=121,..

LINKS

Robert Israel, Table of n, a(n) for n = 1..385

FORMULA

a(n) = (n^(n+2)-1)/(n-1) for n > 1. - Robert Israel, Sep 26 2016

MAPLE

3, seq((n^(n+2)-1)/(n-1), n=2..20); # Robert Israel, Sep 26 2016

MATHEMATICA

f[n_]:=Module[{s=0}, Do[s+=n^a, {a, 0, n+1}]; s]; lst={}; Do[AppendTo[lst, f[n]], {n, 30}]; lst

Table[Sum[n^k, {k, 0, n+1}], {n, 20}] (* Harvey P. Dale, Jan 04 2012 *)

CROSSREFS

Cf. A031973

Sequence in context: A107869 A156360 A160884 * A197505 A191371 A113077

Adjacent sequences:  A173465 A173466 A173467 * A173469 A173470 A173471

KEYWORD

nonn

AUTHOR

Vladimir Joseph Stephan Orlovsky, Feb 18 2010

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 15 20:00 EST 2019. Contains 330000 sequences. (Running on oeis4.)