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

Terms

a(0) =1a(1) =5a(2) =14a(3) =31a(4) =58a(5) =93a(6) =148a(7) =219a(8) =306a(9) =407a(10) =550a(11) =695a(12) =898a(13) =1103a(14) =1323a(15) =1610a(16) =1963a(17) =2293a(18) =2738a(19) =3152a(20) =3597a(21) =4116a(22) =4773a(23) =5362a(24) =6073a(25) =6808a(26) =7611a(27) =8437a(28) =9492a(29) =10348