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A009819
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tanh(tan(x)*tan(x))=2/2!*x^2+16/4!*x^4+32/6!*x^6-18944/8!*x^8...
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2
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0, 2, 16, 32, -18944, -2146048, -147605504, 12359002112, 9374161371136, 2762835317030912, 343159496128331776, -231213975915368808448, -236417180330506147856384, -118337919812286157284179968
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Tanh[ Tan[ x ]^2 ] (* Even Part *)
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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