A034163 Number of partitions of n into 3 distinct parts from [ 1,20 ].

0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 7, 8, 10, 12, 14, 16, 19, 21, 24, 27, 30, 33, 36, 38, 40, 42, 43, 44, 45, 45, 45, 45, 44, 43, 42, 40, 38, 36, 33, 30, 27, 24, 21, 19, 16, 14, 12, 10, 8, 7, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0