-9-Knödel numbers.

Terms

a(0) =9a(1) =15a(2) =21a(3) =27a(4) =39a(5) =63a(6) =135a(7) =171a(8) =189a(9) =195a(10) =231a(11) =315a(12) =351a(13) =513a(14) =651a(15) =663a(16) =819a(17) =855a(18) =999a(19) =1197a(20) =1755a(21) =1881a(22) =2223a(23) =2295a(24) =2331a(25) =3111a(26) =3591a(27) =4095a(28) =4347a(29) =4599