Least term of A004767 with exactly 2n divisors.

Terms

a(0) =3a(1) =15a(2) =63a(3) =135a(4) =567a(5) =315a(6) =5103a(7) =1155a(8) =1575a(9) =2835a(10) =413343a(11) =4095a(12) =3720087a(13) =25515a(14) =14175a(15) =10395a(16) =301327047a(17) =20475a(18) =2711943423a(19) =36855a(20) =127575a(21) =2066715a(22) =219667417263a(23) =51975a(24) =354375a(25) =18600435a(26) =121275a(27) =331695a(29) =184275a(31) =135135