A009308 Expansion of log(1+log(1+sin(x))).

0, 1, -2, 6, -27, 159, -1166, 10238, -104794, 1225453, -16119336, 235574622, -3786965344, 66410682571, -1261666673216, 25812801065366, -565833283234896, 13230321868853913, -328685995742718848, 8646006262194855830

Offset

0,3

Links

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Mathematica

With[{nn=20}, CoefficientList[Series[Log[1+Log[1+Sin[x]]], {x, 0, nn}], x] Range[0, nn]!] (* Harvey P. Dale, Mar 21 2012 *)

Crossrefs

Sequence in context: A058133 A306857 A321584 * A032186 A122938 A352139

Adjacent sequences: A009305 A009306 A009307 * A009309 A009310 A009311

Keyword

sign,easy

Author

R. H. Hardin

Extensions

Extended with signs by Olivier Gérard, Mar 15 1997

Status

approved