A013374 arcsinh(sin(x)-sinh(x))=-2/3!*x^3-2/7!*x^7+2240/9!*x^9-2/11!*x^11...

0, -2, 0, -2, 2240, -2, 137280, -403603202, 10325120, -223480857602, 1042911543845760, -119078050291202, 2638564062897339200, -16807721436490038912002, 5561493227350293205440

Offset

0,2

Links

Vaclav Kotesovec, Table of n, a(n) for n = 0..238

Mathematica

With[{nn=40}, Flatten[{0, Take[Drop[CoefficientList[Series[ArcSinh[Sin[x]-Sinh[x]], {x, 0, nn}], x]Range[0, nn-1]!, 2], {2, -1, 2}]}]] (* Harvey P. Dale, Oct 19 2011 *)

Crossrefs

Sequence in context: A281326 A012622 A013370 * A013371 A013372 A209640

Adjacent sequences: A013371 A013372 A013373 * A013375 A013376 A013377

Keyword

sign

Author

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

Extensions

Prepended missing a(0)=0 from Vaclav Kotesovec, Feb 04 2015

Status

approved