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!)
A009676 Expansion of tan(sinh(log(1+x))). 0
0, 1, -1, 5, -24, 166, -1350, 13082, -145376, 1827376, -25592400, 395118272, -6664254432, 121895495632, -2402856317680, 50776649007632, -1144984530078720, 27440409496420096, -696465326225541888 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..18.

MATHEMATICA

Tan[ Sinh[ Log[ 1+x ] ] ]

CROSSREFS

Sequence in context: A009424 A184597 A009601 * A192995 A027851 A120765

Adjacent sequences:  A009673 A009674 A009675 * A009677 A009678 A009679

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 May 12 05:30 EDT 2021. Contains 343812 sequences. (Running on oeis4.)