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

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A009459 Expansion of sin(log(1+x))/cos(x). 0
0, 1, -1, 4, -6, 25, 15, -338, 6972, -70891, 859275, -9640864, 120888174, -1541505979, 21347932515, -308351466590, 4764530724600, -77278806586295, 1328450775136695, -23972129893393796, 455516697937247010 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

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

MATHEMATICA

Sin[ Log[ 1+x ] ]/Cos[ x ]

CoefficientList[Series[Sec[x]*Sin[Log[1 + x]], {x, 0, 20}], x] * Range[0, 20]! (* Vaclav Kotesovec, Jan 24 2015 *)

CROSSREFS

Sequence in context: A241602 A136591 A277997 * A239625 A123055 A272306

Adjacent sequences:  A009456 A009457 A009458 * A009460 A009461 A009462

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 November 14 17:24 EST 2019. Contains 329126 sequences. (Running on oeis4.)