Product_{n>=1} 1 / (1 - a(n)*x^n/n!) = 1 + tan(x).

A353911

Product_{n>=1} 1 / (1 - a(n)*x^n/n!) = 1 + tan(x).

Terms

    a(0) =1a(1) =-2a(2) =2a(3) =-32a(4) =56a(5) =-416a(6) =3184a(7) =-85504a(8) =309760a(9) =-4087552a(10) =48104704a(11) =-546922496a(12) =10591523840a(13) =-194387924992

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