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A013443 tan(tan(x)-arctan(x))=4/3!*x^3-8/5!*x^5+992/7!*x^7+3456/9!*x^9... 0
4, -8, 992, 3456, 2799872, 106544128, 37168683008, 4255728041984, 1543239875821568, 355403465489907712, 155864209273777553408, 58585654628727325196288, 32351390426329866422976512 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Table of n, a(n) for n=0..12.

CROSSREFS

Sequence in context: A260726 A308553 A177860 * A013442 A013441 A013445

Adjacent sequences:  A013440 A013441 A013442 * A013444 A013445 A013446

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified October 22 12:47 EDT 2019. Contains 328318 sequences. (Running on oeis4.)