E.g.f.: sqrt(cos(x)^6 + sin(x)^6).A195105E.g.f.: sqrt(cos(x)^6 + sin(x)^6).Terms a(0) =1a(1) =-3a(2) =21a(3) =177a(4) =11721a(5) =605157a(6) =-13346979a(7) =-22645137063External referencesoeis: A195105