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Search: id:A003720
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| A003720 |
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Expansion of tan(tan(tan(x))).
(Formerly M4301)
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+0
1
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| 1, 6, 168, 10672, 1198080, 208521728, 51874413568, 17449541107712, 7622674735988736, 4193561606973095936, 2836052065377836597248, 2312174256451088534208512, 2236165580390456719589769216
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).
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MATHEMATICA
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Tan[ Tan[ Tan[ x ] ]] (* Odd Part *)
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CROSSREFS
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Adjacent sequences: A003717 A003718 A003719 this_sequence A003721 A003722 A003723
Sequence in context: A143534 A104729 A106661 this_sequence A002884 A166762 A055165
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KEYWORD
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nonn
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AUTHOR
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R. H. Hardin (rhhardin(AT)att.net)
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EXTENSIONS
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Extended and formatted Mar 15 1997 by Olivier Gerard
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