A047748 A discrete analogue of Li(n): Ceiling ( Sum_{k=2..n} 1/log_10 (k) ).

4, 6, 8, 9, 10, 11, 13, 14, 15, 16, 17, 17, 18, 19, 20, 21, 22, 22, 23, 24, 25, 25, 26, 27, 28, 28, 29, 30, 30, 31, 32, 32, 33, 34, 34, 35, 35, 36, 37, 37, 38, 39, 39, 40, 40, 41, 42, 42, 43, 43, 44, 45, 45, 46, 46, 47, 47, 48, 48, 49, 50, 50, 51, 51