id:A009158 - OEIS Search Results

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Expansion of cosh(tan(tan(x))).

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1, 1, 17, 673, 48033, 5387009, 871869745, 192177458593, 55316788832065, 20139680768683777, 9044546204411462737, 4909707244721993221025, 3168104630099094560839393, 2396238201505538217521920001 (list; graph; listen)

	OFFSET	`0,3`
	MATHEMATICA	`Cosh[ Tan[ Tan[ x ] ] ] (* Even Part *)`
	CROSSREFS	`Sequence in context: A063941 A089018 A118769 this_sequence A012050 A012157 A012137` `Adjacent sequences: A009155 A009156 A009157 this_sequence A009159 A009160 A009161`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin (rhhardin(AT)att.net)`
	EXTENSIONS	`Extended and signs tested Mar 15 1997 by Olivier Gerard.`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

AT&T Labs Research