Highly composite numbers (A002182) whose number of divisors is not a multiple of 3.

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =48a(5) =120a(6) =240a(7) =840a(8) =1680a(9) =7560a(10) =15120a(11) =45360a(12) =83160a(13) =166320a(14) =498960a(15) =665280a(16) =1081080a(17) =2162160a(18) =6486480a(19) =8648640a(20) =17297280a(21) =36756720a(22) =110270160a(23) =147026880a(24) =294053760a(25) =698377680a(26) =2095133040a(27) =2793510720a(28) =5587021440a(29) =64250746560