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A012676 exp(tanh(x)*arctan(x))=1+2/2!*x^2-4/4!*x^4-40/6!*x^6+2704/8!*x^8... 0

%I

%S 1,2,-4,-40,2704,-135392,6955456,-305645184,-7730286336,7469091807744,

%T -2423718751585280,765682386623223808,-278356000956737810432,

%U 126892576689335471251456

%N exp(tanh(x)*arctan(x))=1+2/2!*x^2-4/4!*x^4-40/6!*x^6+2704/8!*x^8...

%K sign

%O 0,2

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

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Last modified October 25 23:17 EDT 2020. Contains 338026 sequences. (Running on oeis4.)