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Search: id:A012237
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A012237 arctanh(atan(atanh(x)))=x+2/3!*x^3+32/5!*x^5+1168/7!*x^7+80768/9!*x^9... +0
1
1, 2, 32, 1168, 80768, 8855296, 1420471296, 312821661696, 90619729117184, 33397289918332928, 15260151754256547840, 8466388564521610903552, 5606464118961336397856768, 4368144479139164180218642432 (list; graph; listen)
OFFSET

0,2
CROSSREFS

Sequence in context: A012198 A012114 A055929 this_sequence A012093 A012214 A012140

Adjacent sequences: A012234 A012235 A012236 this_sequence A012238 A012239 A012240

KEYWORD

nonn

AUTHOR

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

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.

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