a(n) = (3*n + 1)^9.A016785a(n) = (3*n + 1)^9.Terms a(0) =1a(1) =262144a(2) =40353607a(3) =1000000000a(4) =10604499373a(5) =68719476736a(6) =322687697779External referencesoeis: A016785