a(n) = 8*(10^(2n+1)-1)/9 - 8*10^n.A332180a(n) = 8*(10^(2n+1)-1)/9 - 8*10^n.Terms a(0) =0a(1) =808a(2) =88088a(3) =8880888a(4) =888808888a(5) =88888088888External referencesoeis: A332180