a(n) = (81^n - 2^n)/79.A180846a(n) = (81^n - 2^n)/79.Terms a(0) =0a(1) =1a(2) =83a(3) =6727a(4) =544895a(5) =44136511a(6) =3575057423a(7) =289579651327External referencesoeis: A180846