Position of n-th 8 in A031312.

Terms

a(0) =76a(1) =78a(2) =80a(3) =82a(4) =84a(5) =217a(6) =220a(7) =223a(8) =226a(9) =229a(10) =367a(11) =370a(12) =373a(13) =376a(14) =379a(15) =517a(16) =520a(17) =523a(18) =526a(19) =529a(20) =667a(21) =670a(22) =673a(23) =676a(24) =679a(25) =817a(26) =820a(27) =823a(28) =826a(29) =829