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

 

Logo

Invitation: celebrating 50 years of OEIS, 250000 sequences, and Sloane's 75th, there will be a conference at DIMACS, Rutgers, Oct 9-10 2014.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A013333 sinh(exp(x)-sec(x)) = x + 2/3!*x^3 - 4/4!*x^4 + 12/5!*x^5 - 120/6!*x^6 + ... 0
0, 1, 0, 2, -4, 12, -120, 128, -4464, 6912, -206880, 776800, -12788224, 95713984, -1101528064, 13091780224, -133871961344, 2061579919104, -22144979338752, 381671021731840, -4690276122840064, 83860033272100864 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,4

LINKS

Table of n, a(n) for n=0..21.

MATHEMATICA

With[{nn=30}, CoefficientList[Series[Sinh[Exp[x]-Sec[x]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Oct 12 2012 *)

CROSSREFS

Sequence in context: A230814 A038791 A001696 * A154882 A062000 A053040

Adjacent sequences:  A013330 A013331 A013332 * A013334 A013335 A013336

KEYWORD

sign

AUTHOR

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

STATUS

approved

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

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

Last modified September 30 23:47 EDT 2014. Contains 247496 sequences.