E.g.f. A(x) satisfies: A( tanh( A(x) ) ) = tan(x).

A279837

E.g.f. A(x) satisfies: A( tanh( A(x) ) ) = tan(x).

Terms

    a(0) =1a(1) =2a(2) =20a(3) =496a(4) =23120a(5) =1747360a(6) =195269568a(7) =30288321792

External references