Numbers with at least three 3s in their prime signature.

Terms

a(0) =27000a(1) =74088a(2) =189000a(3) =287496a(4) =297000a(5) =343000a(6) =351000a(7) =370440a(8) =459000a(9) =474552a(10) =513000a(11) =621000a(12) =783000a(13) =814968a(14) =837000a(15) =963144a(16) =999000a(17) =1029000a(18) =1061208a(19) =1107000a(20) =1157625a(21) =1161000a(22) =1259496a(23) =1269000a(24) =1323000a(25) =1331000a(26) =1407672a(27) =1431000a(28) =1437480a(29) =1481544