a(n) = 8*(10^(2*n+1) - 1)/9 - 6*10^n.A332182a(n) = 8*(10^(2*n+1) - 1)/9 - 6*10^n.Terms a(0) =2a(1) =828a(2) =88288a(3) =8882888a(4) =888828888a(5) =88888288888External referencesoeis: A332182