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A024285
Expansion of tanh(sin(x))*sin(x)/2.
0
0, 1, -8, 144, -5184, 305152, -26442752, 3162378240, -498850234368, 100338708840448, -25063296518586368, 7611477148997517312, -2761834207318131081216, 1180050998603017168617472
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..13.
MATHEMATICA
Tanh[ Sin[ x ] ]*Sin[ x ]/2 (* Even Part *)
CROSSREFS
Cf.
A009795
.
Sequence in context:
A052764
A341957
A024284
*
A111687
A231851
A071305
Adjacent sequences:
A024282
A024283
A024284
*
A024286
A024287
A024288
KEYWORD
sign
AUTHOR
R. H. Hardin
EXTENSIONS
Extended with signs Mar 1997
STATUS
approved
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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)