a(n) = (38^n - 1)/37.A218741a(n) = (38^n - 1)/37.Terms a(0) =0a(1) =1a(2) =39a(3) =1483a(4) =56355a(5) =2141491a(6) =81376659a(7) =3092313043a(8) =117507895635External referencesoeis: A218741