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A013556 Numerator of [x^(2n)] of the Taylor series cos(cot(x)-coth(x))= 1 -2*x^2/9 +2*x^4/243 -676*x^6/229635 +62*x^8/295245 -... 1
1, -2, 2, -676, 62, -2714132, 7223932, -120994136, 13831453742, -463898158095404, 1539871314859772, -1284535259155106488, 5072225817430199548, -10084534723769793975176, 4033550950013006300665768, -325181210925396330786544500464, 435279229771188834270330121078 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
MATHEMATICA
Numerator[Take[CoefficientList[Series[Cos[Cot[x] - Coth[x]], {x, 0, 35}], x], {1, -2, 2}]] (* Vincenzo Librandi, Nov 12 2016 *)
CROSSREFS
Sequence in context: A067091 A334599 A371203 * A093596 A095304 A111819
KEYWORD
sign,frac
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
EXTENSIONS
Name edited by R. J. Mathar, Dec 22 2011
STATUS
approved

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Last modified March 19 04:58 EDT 2024. Contains 370952 sequences. (Running on oeis4.)