E.g.f. satisfies: A'(x) = (cos(x) + sin(x)*A(x)) / (cos(x)*A(x) - sin(x)).

A245115

E.g.f. satisfies: A'(x) = (cos(x) + sin(x)*A(x)) / (cos(x)*A(x) - sin(x)).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =7a(6) =25a(7) =117a(8) =567a(9) =2931a(10) =20165a(11) =140169a(12) =1008691a(13) =8756711a(14) =80546609a(15) =736667037a(16) =7767188015a(17) =87947663355a(18) =983717687645

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