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!)
A009466 Expansion of sin(log(1+x)/cosh(x)). 1
0, 1, -1, -2, 6, 25, -165, -366, 6188, 5573, -294885, -813034, 35950266, -141917555, -1041102153, -22047494262, 843256939320, -9500491668343, 83224830490839, -2409782172431474, 68273680978437710, -1275838005728358495 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..100

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Sin[Log[1+x]/Cosh[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Nov 10 2011 *)

CROSSREFS

Sequence in context: A292748 A178087 A109286 * A032479 A029988 A050573

Adjacent sequences:  A009463 A009464 A009465 * A009467 A009468 A009469

KEYWORD

sign,easy

AUTHOR

R. H. Hardin

EXTENSIONS

Extended with signs by Olivier Gérard, Mar 15 1997

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 September 21 04:58 EDT 2020. Contains 337267 sequences. (Running on oeis4.)