A054438 Third derivative of n.
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2, 3, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 4, 5, 7, 6, 3, 2, 0, 1, 1, 0, 0, 0, 0, 1, 3, 2, 2, 3, 1, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 8, 9, 11, 10, 15, 14, 12, 13, 7, 6, 4, 5, 0, 1, 3, 2, 2, 3, 1, 0, 0, 0, 0, 1, 1, 0, 2, 3, 6, 7, 5, 4, 4, 5, 7, 6, 3
Offset: 0