a(n) = A099371(n)^2.A099372a(n) = A099371(n)^2.Terms a(0) =0a(1) =1a(2) =81a(3) =6724a(4) =558009a(5) =46308025a(6) =3843008064a(7) =318923361289External referencesoeis: A099372