A009815 - OEIS

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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, 2, 4, -178, -5336, 121082, 24994924, 661822982, -273928948016, -42186434881678, 4278599785289044, 2873614390992176702, 193732299468570630904, -268774878028807800675478, -95724942960306213127796036 (list; graph; refs; listen; history; internal format)

	OFFSET	`0,2`
	MATHEMATICA	`Tanh[ Tan[ x ]Sin[ x ] ] ( Even Part *)`
	CROSSREFS	`Sequence in context: A018595 A009553 A012371 * A012693 A018608 A018611` `Adjacent sequences: A009812 A009813 A009814 * 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 February 14 06:37 EST 2012. Contains 205571 sequences.