A004085 Sum of digits of Euler totient function of n.

1, 1, 2, 2, 4, 2, 6, 4, 6, 4, 1, 4, 3, 6, 8, 8, 7, 6, 9, 8, 3, 1, 4, 8, 2, 3, 9, 3, 10, 8, 3, 7, 2, 7, 6, 3, 9, 9, 6, 7, 4, 3, 6, 2, 6, 4, 10, 7, 6, 2, 5, 6, 7, 9, 4, 6, 9, 10, 13, 7, 6, 3, 9