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A012222 exp(arctan(tanh(x)))=1+x+1/2!*x^2-3/3!*x^3-15/4!*x^4+41/5!*x^5... 1
1, 1, 1, -3, -15, 41, 561, -1243, -40415, 58001, 4825121, -1956083, -866056815, -740509639, 218527875281, 509169335477, -73838559553215, -295854887910879, 32207514779999041, 189240977761969437 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
CROSSREFS
Sequence in context: A295938 A096742 A012256 * A069267 A348411 A059270
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved

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Last modified March 4 08:48 EST 2024. Contains 370528 sequences. (Running on oeis4.)