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A012629
tanh(arcsinh(x)*arctan(x))=2/2!*x^2-12/4!*x^4-2/6!*x^6+10248/8!*x^8...
0
2, -12, -2, 10248, -914598, 58990140, 390971670, -1399074591600, 414051949573170, -75189740418805500, -1988456671385842770, 10786170755283590925720, -6649588570098570005749110
OFFSET
0,1
CROSSREFS
Sequence in context: A185633 A246737 A012626 * A371589 A082827 A290100
KEYWORD
sign
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved