This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A024247 Expansion of e.g.f. sinh(x)*sin(tan(x))/2, even powers only. 1
 0, 1, 4, 4, -1152, -91888, -7570624, -730713664, -83226398720, -10970712254208, -1615807519095808, -249282435016526848, -33772384403350126592, -217538905379543379968, 3508702299226395880538112 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..100 MATHEMATICA With[{nn=30}, Take[CoefficientList[Series[Sinh[x]Sin[Tan[x]]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Oct 24 2013 *) CROSSREFS Cf. A009627. Sequence in context: A068556 A078243 A024246 * A067445 A167003 A254294 Adjacent sequences:  A024244 A024245 A024246 * A024248 A024249 A024250 KEYWORD sign AUTHOR EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 Prior Mathematica program replaced by Harvey P. Dale, Oct 24 2013 Clarified definition, Joerg Arndt, Feb 09 2014 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.

Last modified July 19 09:33 EDT 2019. Contains 325155 sequences. (Running on oeis4.)