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A012033 sech(sin(sinh(x)))=1-1/2!*x^2+5/4!*x^4-13/6!*x^6-407/8!*x^8... 0
1, -1, 5, -13, -407, 30151, -1142483, 19202427, 3747342929, -722092683505, 76341208430549, -2313301317273981, -1769780901329435719, 628518840135423728599, -125498832189487922441219 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
CROSSREFS
Sequence in context: A067135 A122900 A145557 * A007540 A290171 A157250
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)