{Concatenation of n-1 and n+1}/n where n is a member of A069871.

Terms

a(0) =8a(1) =90a(2) =92a(3) =98a(4) =992a(5) =998a(6) =9992a(7) =9998a(8) =99992a(9) =99998a(10) =999992a(11) =999994a(12) =999998a(13) =9999992a(14) =9999998a(15) =99999992a(16) =99999998a(17) =999999992a(18) =999999998a(19) =9999999992a(20) =9999999998a(21) =99999999992a(22) =99999999998a(23) =999999999992a(24) =999999999994a(25) =999999999998