a(n) = Sum_{k=1..n} mu(gcd(n, k)) * lcm(n, k) / gcd(n, k).

Terms

a(0) =1a(1) =1a(2) =8a(3) =14a(4) =49a(5) =26a(6) =146a(7) =112a(8) =234a(9) =149a(10) =604a(11) =238a(12) =1013a(13) =440a(14) =842a(15) =896a(16) =2311a(17) =702a(18) =3248a(19) =1386a(20) =2491a(21) =1814a(22) =5818a(23) =1904a(24) =6200a(25) =3041a(26) =6318a(27) =4102a(28) =11773a(29) =2524