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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 3 |
| 9 | 7 |
| 10 | 10 |
| 11 | 30 |
| 12 | 37 |
| 13 | 151 |
| 14 | 202 |
| 15 | 698 |
| 16 | 975 |
| 17 | 4066 |
| 18 | 6719 |
| 19 | 38176 |
| 20 | 61756 |
| 21 | 522856 |
| 22 | 808712 |
| 23 | 8751773 |
| 24 | 13746429 |
| 25 | 162280787 |
| 26 | 268587501 |
| 27 | 3757757825 |
| 28 | 6472225006 |
| 29 | 115990561431 |
| 30 | 202655793135 |
[1,1,1,1,1,1,1,3,7,10,30,37,151,202,698,975,4066, 6719,38176,61756,522856,808712,8751773,13746429, 162280787,268587501,3757757825,6472225006, 115990561431,202655793135] |