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A012630 arctanh(arcsinh(x)*atan(x))=2/2!*x^2-12/4!*x^4+478/6!*x^6-30072/8!*x^8... 0
2, -12, 478, -30072, 3540762, -612942660, 152039588790, -50468748044400, 21718174357721010, -11738352932289531900, 7790876172172937111310, -6228079669260433576829160, 5903220687917269513392843210 (list; graph; refs; listen; history; internal format)
OFFSET

0,1

CROSSREFS

Sequence in context: A009510 A091471 A012625 * A013173 A013147 A050643

Adjacent sequences:  A012627 A012628 A012629 * A012631 A012632 A012633

KEYWORD

sign

AUTHOR

Patrick Demichel (dml(AT)hpfrcu03.france.hp.com)

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Last modified February 16 15:50 EST 2012. Contains 205931 sequences.