The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A009079 Expansion of e.g.f. cos(tan(x)*sinh(x)), even powers only. 1
 1, 0, -12, -360, -11312, -342720, 1391808, 3011648640, 712998408448, 151782346782720, 33053467644945408, 7470073537438955520, 1689905119837405401088, 334766606514085190615040, 19605053176568811703615488, -43798309867240412782195998720 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 LINKS G. C. Greubel, Table of n, a(n) for n = 0..239 MAPLE seq(coeff(series(factorial(n)*cos(tan(x)*sinh(x)), x, n+1), x, n), n=0..30, 2); # Muniru A Asiru, Jul 25 2018 MATHEMATICA With[{nn=40}, Take[CoefficientList[Series[Cos[Tan[x] Sinh[x]], {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Aug 23 2014 *) PROG (PARI) x='x+O('x^60); v=Vec(serlaplace(cos(tan(x)*sinh(x)))); vector(#v\2, n, v[2*n-1]) \\ G. C. Greubel, Jul 24 2018 CROSSREFS Sequence in context: A012386 A130213 A012633 * A012379 A012424 A009165 Adjacent sequences: A009076 A009077 A009078 * A009080 A009081 A009082 KEYWORD sign AUTHOR R. H. Hardin EXTENSIONS Extended with signs by Olivier Gérard, Mar 15 1997 More terms from and prior Mathematica program replaced by Harvey P. Dale, Aug 23 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified October 3 10:55 EDT 2023. Contains 365861 sequences. (Running on oeis4.)