5-almost primes with semiprime digits (digits 4, 6, 9 only).

Terms

a(0) =464a(1) =496a(2) =696a(3) =944a(4) =4446a(5) =4496a(6) =4664a(7) =6444a(8) =6669a(9) =6996a(10) =9666a(11) =9944a(12) =44649a(13) =44664a(14) =44694a(15) =44696a(16) =44946a(17) =44964a(18) =46664a(19) =46696a(20) =49446a(21) =49496a(22) =49944a(23) =64664a(24) =66664a(25) =66996a(26) =69464a(27) =69944a(28) =69996a(29) =94996