Composite numbers whose prime factors have no digits other than 8 and 9.

Terms

a(0) =7921a(1) =704969a(2) =800911a(3) =8001011a(4) =8009021a(5) =8802011a(6) =8810911a(7) =8899021a(8) =62742241a(9) =71281079a(10) =79120021a(11) =80001121a(12) =80982001a(13) =88109911a(14) =88910021a(15) =712089979a(16) =712802869a(17) =783378979a(18) =784171079a(19) =791120021a(20) =791200121a(21) =792012869a(22) =800020021a(23) =800109911a(24) =800901121a(25) =800991011a(26) =809001101a(27) =809811011a(28) =880111121