Highly composite numbers that are a product of two highly composite numbers greater than 1.

Terms

a(0) =4a(1) =12a(2) =24a(3) =36a(4) =48a(5) =120a(6) =240a(7) =360a(8) =720a(9) =1680a(10) =2520a(11) =5040a(12) =7560a(13) =10080a(14) =15120a(15) =20160a(16) =45360a(17) =50400a(18) =55440a(19) =110880a(20) =166320a(21) =221760a(22) =332640a(23) =498960a(24) =554400a(25) =665280a(26) =1441440a(27) =2162160a(28) =2882880a(29) =4324320