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Search: id:A012141
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A012141 tanh(arcsin(arctanh(x)))=x+1/3!*x^3+9/5!*x^5+281/7!*x^7+20913/9!*x^9... +0
1
1, 1, 9, 281, 20913, 2869329, 613734393, 185272366761, 74333015297505, 38107181118565665, 24270343990842570345, 18795056467624757017785, 17394205995630055629900945, 18964089582659357000823035505 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Adjacent sequences: A012138 A012139 A012140 this_sequence A012142 A012143 A012144

Sequence in context: A028456 A119408 A012234 this_sequence A110553 A118893 A078326

KEYWORD

nonn

AUTHOR

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

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Last modified November 9 12:23 EST 2009. Contains 166233 sequences.

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