Bi-unitary multiperfect numbers.

Terms

a(0) =1a(1) =6a(2) =60a(3) =90a(4) =120a(5) =672a(6) =2160a(7) =10080a(8) =22848a(9) =30240a(10) =342720a(11) =523776a(12) =1028160a(13) =1528800a(14) =6168960a(15) =7856640a(16) =7983360a(17) =14443520a(18) =22932000a(19) =23569920a(20) =43330560a(21) =44553600a(22) =51979200a(23) =57657600a(24) =68796000a(25) =133660800a(26) =172972800a(27) =779688000a(28) =1476304896a(29) =2339064000