E.g.f. satisfies: A(x) = exp(x^4*A(x)^4/4!).A200314E.g.f. satisfies: A(x) = exp(x^4*A(x)^4/4!).Terms a(0) =1a(1) =1a(2) =315a(3) =975975a(4) =12909521625External referencesoeis: A200314