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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009642 Expansion of tan(ln(1+x))*cos(x). 0
0, 1, -1, 1, -12, 75, -555, 4863, -48832, 552293, -6948765, 96252429, -1455398604, 23851683999, -421107222263, 7967875766875, -160844272481760, 3450332758515657, -78376836240861273, 1879454111175884697 (list; graph; refs; listen; history; internal format)
OFFSET

0,5

MATHEMATICA

Tan[ Log[ 1+x ] ]*Cos[ x ]

CROSSREFS

Sequence in context: A092867 A053310 A006235 * A051104 A044199 A044580

Adjacent sequences:  A009639 A009640 A009641 * A009643 A009644 A009645

KEYWORD

sign,easy

AUTHOR

R. H. Hardin (rhhardin(AT)att.net)

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gerard.

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

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

Last modified February 15 07:06 EST 2012. Contains 205694 sequences.