E.g.f.: Sum_{n>=0} (1 - exp(-n^n*x))^n.A249584E.g.f.: Sum_{n>=0} (1 - exp(-n^n*x))^n.Terms a(0) =1a(1) =1a(2) =31a(3) =117715a(4) =103060086811External referencesoeis: A249584