Smallest k for which k, 2k, ... nk all contain the digit 8.

Terms

a(0) =8a(1) =84a(2) =284a(3) =2842a(4) =8937a(5) =8964a(6) =8964a(7) =85964a(8) =89641a(9) =89641a(10) =89641a(11) =89729a(12) =296984a(13) =429817a(14) =897299a(15) =897299a(16) =897299a(17) =897299a(18) =897299a(19) =897299a(20) =897299a(21) =897299a(22) =897299a(23) =8697299a(24) =9897947a(25) =9929817a(26) =9929817a(27) =9929817a(28) =9929817a(29) =9929817