A024237 Expansion of sin(sin(x)*x)/2.

0, 1, -2, -57, 1676, -17635, -1122006, 99327235, -4010916008, -75491622279, 33762742192790, -3763414135963009, 184034237755893348, 24103347121120917013, -8293034089278790553534

Offset

0,3

Links

Table of n, a(n) for n=0..14.

Mathematica

With[{nn=30}, Take[CoefficientList[Series[Sin[Sin[x]*x]/2, {x, 0, nn}], x] Range[0, nn]!, {1, -1, 2}]] (* Harvey P. Dale, Nov 02 2015 *)

Crossrefs

Cf. A009484.

Sequence in context: A229015 A324318 A058196 * A030263 A359242 A090743

Adjacent sequences: A024234 A024235 A024236 * A024238 A024239 A024240

Keyword

sign

Author

R. H. Hardin

Extensions

Extended with signs Mar 1997

Prior Mathematica program replaced by Harvey P. Dale, Nov 02 2015

Status

approved