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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 6 |
| 5 | 10 |
| 6 | 30 |
| 7 | 105 |
| 8 | 70 |
| 9 | 42 |
| 10 | 210 |
| 11 | 2310 |
| 12 | 2310 |
| 13 | 4290 |
| 14 | 6006 |
| 15 | 15015 |
| 16 | 30030 |
| 17 | 170170 |
| 18 | 510510 |
| 19 | 1939938 |
| 20 | 1385670 |
| 21 | 881790 |
| 22 | 9699690 |
| 23 | 223092870 |
| 24 | 44618574 |
| 25 | 17160990 |
| 26 | 74364290 |
| 27 | 31870410 |
| 28 | 223092870 |
| 29 | 6469693230 |
| 30 | 6469693230 |
| 31 | 100280245065 |
[1,1,2,3,6,10,30,105,70,42,210,2310,2310,4290, 6006,15015,30030,170170,510510,1939938,1385670, 881790,9699690,223092870,44618574,17160990, 74364290,31870410,223092870,6469693230,6469693230, 100280245065] |