Position of n-th 6 in A031027.

Terms

a(0) =8a(1) =12a(2) =15a(3) =20a(4) =28a(5) =34a(6) =58a(7) =69a(8) =72a(9) =84a(10) =89a(11) =91a(12) =101a(13) =104a(14) =120a(15) =126a(16) =127a(17) =139a(18) =141a(19) =145a(20) =146a(21) =165a(22) =177a(23) =180a(24) =185a(25) =191a(26) =198a(27) =215a(28) =216a(29) =218