a(n) = n/(Sum_{k=1..n} 1/phi(A341813(n)*k)).

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =2a(5) =16a(6) =24a(7) =192a(8) =108a(9) =3a(10) =48a(11) =360a(12) =117a(13) =630a(14) =16a(15) =1920a(16) =5440a(17) =2880a(18) =13680a(19) =57600a(20) =5376a(21) =5760a(22) =31680a(23) =11264a(24) =17600a(25) =54912a(26) =85536a(27) =126720a(28) =565488a(29) =5987520