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A012130 arctanh(arcsin(tanh(x)))=x+1/3!*x^3+9/5!*x^5+169/7!*x^7+6513/9!*x^9... 0
1, 1, 9, 169, 6513, 382449, 33949369, 4083320409, 654225568353, 132856897394785, 33620948951783145, 10322993203249787529, 3791611637554126839505, 1638719968206448148183889 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

CROSSREFS

Sequence in context: A202836 A052774 A122725 * A151997 A119032 A121476

Adjacent sequences:  A012127 A012128 A012129 * A012131 A012132 A012133

KEYWORD

nonn

AUTHOR

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

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Last modified February 14 10:43 EST 2012. Contains 205614 sequences.