E.g.f. satisfies: A(x) = Sum_{n>=0} AGM(1, A(x)^(4n))*x^n/n!, where AGM(x,y) is the arithmetic-geometric mean of Gauss.

A172493

E.g.f. satisfies: A(x) = Sum_{n>=0} AGM(1, A(x)^(4n))*x^n/n!, where AGM(x,y) is the arithmetic-geometric mean of Gauss.

Terms

    a(0) =1a(1) =1a(2) =5a(3) =55a(4) =969a(5) =23471a(6) =722893a(7) =27025349a(8) =1188914961a(9) =60185489239

External references