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A012632 sec(arcsinh(x)*arctan(x))=1+12/4!*x^4-360/6!*x^6+26768/8!*x^8... 0
1, 0, 12, -360, 26768, -3003840, 500757312, -114797434752, 34719912016128, -13385737151096832, 6408112715151793152, -3729311544255904696320, 2592887206723575200256000, -2122643658026530680956928000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Table of n, a(n) for n=0..13.

CROSSREFS

Sequence in context: A012552 A012385 A012430 * A081791 A166183 A218310

Adjacent sequences:  A012629 A012630 A012631 * A012633 A012634 A012635

KEYWORD

sign

AUTHOR

Patrick Demichel (patrick.demichel(AT)hp.com)

STATUS

approved

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Last modified May 27 02:41 EDT 2022. Contains 354093 sequences. (Running on oeis4.)