Sum of digits of Euler totient function of n.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =4a(5) =2a(6) =6a(7) =4a(8) =6a(9) =4a(10) =1a(11) =4a(12) =3a(13) =6a(14) =8a(15) =8a(16) =7a(17) =6a(18) =9a(19) =8a(20) =3a(21) =1a(22) =4a(23) =8a(24) =2a(25) =3a(26) =9a(27) =3a(28) =10a(29) =8