a(n) = 10^(2*n+1) - 1 - 8*10^n.A332191a(n) = 10^(2*n+1) - 1 - 8*10^n.Terms a(0) =1a(1) =919a(2) =99199a(3) =9991999a(4) =999919999a(5) =99999199999External referencesoeis: A332191