Numbers n such that both n and n/2 are highly composite (A002182).

Terms

a(0) =2a(1) =4a(2) =12a(3) =24a(4) =48a(5) =120a(6) =240a(7) =360a(8) =720a(9) =1680a(10) =2520a(11) =5040a(12) =10080a(13) =15120a(14) =20160a(15) =50400a(16) =55440a(17) =110880a(18) =166320a(19) =221760a(20) =332640a(21) =554400a(22) =665280a(23) =1441440a(24) =2162160a(25) =2882880a(26) =4324320a(27) =7207200a(28) =8648640a(29) =14414400