Position of n-th 8 in A031111.

Terms

a(0) =5a(1) =16a(2) =22a(3) =25a(4) =39a(5) =59a(6) =73a(7) =84a(8) =86a(9) =91a(10) =94a(11) =106a(12) =116a(13) =133a(14) =137a(15) =143a(16) =159a(17) =160a(18) =163a(19) =166a(20) =167a(21) =202a(22) =221a(23) =225a(24) =237a(25) =240a(26) =243a(27) =260a(28) =263a(29) =320