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A012801 exp(sec(x)*arctan(x))=1+x+1/2!*x^2+2/3!*x^3+5/4!*x^4+40/5!*x^5... 1
1, 1, 1, 2, 5, 40, 205, 576, 2473, 46208, 475385, 1293184, -2814227, 309637120, 5900398725, 5786437632, -532397600303, 7315622592512, 273302104270705, -347058934743040, -68724093821987755, 483735262691819520 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
CROSSREFS
Sequence in context: A110066 A155176 A127974 * A183910 A162035 A366358
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved

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Last modified June 21 21:50 EDT 2024. Contains 373559 sequences. (Running on oeis4.)