id:A009021 - OEIS Search Results

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Expansion of cos(ln(1+tan(x))).

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1, 0, -1, 3, -18, 100, -726, 5698, -52028, 522720, -5849876, 71473468, -951628488, 13674233040, -211091632376, 3478906531688, -60920066577648, 1127785660994560, -21969631512312976, 448167387287730608 (list; graph; listen)

	OFFSET	`0,4`
	MATHEMATICA	`Cos[ Log[ 1+Tan[ x ] ] ]`
	CROSSREFS	`Sequence in context: A081151 A132848 A038158 this_sequence A124408 A136779 A106328` `Adjacent sequences: A009018 A009019 A009020 this_sequence A009022 A009023 A009024`
	KEYWORD	`sign,easy`
	AUTHOR	`R. H. Hardin (rhh(AT)cadence.com)`
	EXTENSIONS	`Extended with signs Mar 15 1997 by Olivier Gerard.`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.

AT&T Labs Research