login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A012960 E.g.f.: exp(arctan(x)+log(x+1))=1+2*x+3/2!*x^2+2/3!*x^3-11/4!*x^4-30/5!*x^5... 1
1, 2, 3, 2, -11, -30, 175, 1010, -6135, -60670, 374875, 5719650, -35199875, -779710750, 4687746375, 145208599250, -836951243375, -35435177514750, 191995883837875, 10975003189933250, -54688433347786875 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..20.

FORMULA

A012960(n) = (n*A002019(n)-A002019(n+1))/(n-1) for n > 1 [From Mark van Hoeij, Jul 02 2010]

MATHEMATICA

With[{nn=20}, CoefficientList[Series[Exp[ArcTan[x]+Log[x+1]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Jul 25 2013 *)

CROSSREFS

Sequence in context: A220947 A224417 A225787 * A013117 A120864 A173463

Adjacent sequences:  A012957 A012958 A012959 * A012961 A012962 A012963

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

EXTENSIONS

Definition clarified by Harvey P. Dale, Jul 25 2013

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 February 17 21:35 EST 2020. Contains 332006 sequences. (Running on oeis4.)