E.g.f. exp(sin(x)^2) (even powers only).

A009217

E.g.f. exp(sin(x)^2) (even powers only).

Terms

    a(0) =1a(1) =2a(2) =4a(3) =-88a(4) =-1136a(5) =46112a(6) =1098304a(7) =-103251328a(8) =-1963486976a(9) =585781985792

External references