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Search: id:A009815
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A009815 tanh(tan(x)*sin(x))=2/2!*x^2+4/4!*x^4-178/6!*x^6-5336/8!*x^8... +0
3
0, 2, 4, -178, -5336, 121082, 24994924, 661822982, -273928948016, -42186434881678, 4278599785289044, 2873614390992176702, 193732299468570630904, -268774878028807800675478, -95724942960306213127796036 (list; graph; listen)
OFFSET

0,2

MATHEMATICA

Tanh[ Tan[ x ]*Sin[ x ] ] (* Even Part *)

CROSSREFS

Sequence in context: A018595 A009553 A012371 this_sequence A012693 A018608 A018611

Adjacent sequences: A009812 A009813 A009814 this_sequence A009816 A009817 A009818

KEYWORD

sign

AUTHOR

R. H. Hardin (rhhardin(AT)att.net)

EXTENSIONS

Extended with signs Mar 15 1997 by Olivier Gerard.

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.


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