a(n) = (10^(2*n+1) - 1)/9 + 8*10^n.A332119a(n) = (10^(2*n+1) - 1)/9 + 8*10^n.Terms a(0) =9a(1) =191a(2) =11911a(3) =1119111a(4) =111191111a(5) =11111911111External referencesoeis: A332119