n and n+9 are 9-almost primes.

Terms

a(0) =268992a(1) =338976a(2) =516375a(3) =675783a(4) =922176a(5) =984375a(6) =1060695a(7) =1107351a(8) =1164375a(9) =1216215a(10) =1233216a(11) =1361367a(12) =1388736a(13) =1458720a(14) =1668672a(15) =1843632a(16) =1877175a(17) =2018592a(18) =2075463a(19) =2317491a(20) =2333520a(21) =2395575a(22) =2440935a(23) =2457936a(24) =2495367a(25) =2499255a(26) =2546775a(27) =2559375a(28) =2811744