a(1) = a(2) = 1; a(n+2) = a(n+1) + a(n+1)^a(n).A058522a(1) = a(2) = 1; a(n+2) = a(n+1) + a(n+1)^a(n).Terms a(0) =1a(1) =1a(2) =2a(3) =4a(4) =20a(5) =160020External referencesoeis: A058522