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A012842 arcsin(sec(x)*arctanh(x))=x+6/3!*x^3+128/5!*x^5+7000/7!*x^7... 0
1, 6, 128, 7000, 757760, 137329280, 37511412352, 14396574922496, 7385535722319872, 4879586077682790400, 4034467892180241121280, 4080124101723746610511872, 4954185596977233058289319936 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

CROSSREFS

Sequence in context: A177756 A089314 A111873 * A012638 A095695 A156475

Adjacent sequences:  A012839 A012840 A012841 * A012843 A012844 A012845

KEYWORD

nonn

AUTHOR

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

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Last modified February 13 08:12 EST 2012. Contains 205451 sequences.