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A009678
Expansion of tan(sinh(tan(x))).
0
1, 5, 113, 5725, 509729, 70109269, 13747568721, 3638247408429, 1248754592688193, 539284011302978597, 286116175138397606705, 182918545555610954788989, 138683263058208603513689441
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..12.
MATHEMATICA
Tan[ Sinh[ Tan[ x ] ] ] (* Odd Part *)
CROSSREFS
Sequence in context:
A279836
A279838
A009603
*
A009691
A194570
A210908
Adjacent sequences:
A009675
A009676
A009677
*
A009679
A009680
A009681
KEYWORD
nonn
AUTHOR
R. H. Hardin
EXTENSIONS
Extended and signs tested Mar 15 1997 by
Olivier Gérard
.
STATUS
approved
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Last modified August 31 21:24 EDT 2024. Contains 375573 sequences. (Running on oeis4.)