Inverse Moebius transform applied thrice to natural numbers.

Terms

a(0) =1a(1) =5a(2) =6a(3) =16a(4) =8a(5) =30a(6) =10a(7) =42a(8) =24a(9) =40a(10) =14a(11) =96a(12) =16a(13) =50a(14) =48a(15) =99a(16) =20a(17) =120a(18) =22a(19) =128a(20) =60a(21) =70a(22) =26a(23) =252a(24) =46a(25) =80a(26) =82a(27) =160a(28) =32a(29) =240