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Search: id:A012220
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A012220 cosh(arctan(arcsinh(x)))=1+1/2!*x^2-11/4!*x^4+349/6!*x^6-22007/8!*x^8... +0
1
1, 1, -11, 349, -22007, 2312601, -365164227, 80916522933, -23968582079343, 9151870592718513, -4378918837383018747, 2566828786036427906445, -1809533477302236292739175, 1510703360292377534570508105 (list; graph; listen)
OFFSET

0,3
CROSSREFS

Sequence in context: A092609 A091537 A033517 this_sequence A012138 A067428 A066268

Adjacent sequences: A012217 A012218 A012219 this_sequence A012221 A012222 A012223

KEYWORD

sign

AUTHOR

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

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Last modified August 29 17:54 EDT 2008. Contains 143238 sequences.

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