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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 18 |
| 5 | 42 |
| 6 | 95 |
| 7 | 524 |
| 8 | 273585 |
| 9 | 1735537 |
| 10 | 4406057 |
| 11 | 4406063 |
| 12 | 4406188 |
| 13 | 4406196 |
| 14 | 4406341 |
| 15 | 4406539 |
| 16 | 4406541 |
| 17 | 28703894 |
| 18 | 73694240 |
| 19 | 73694281 |
| 20 | 73694287 |
| 21 | 73694360 |
| 22 | 73694363 |
| 23 | 73694410 |
| 24 | 3287860772 |
| 25 | 3287860773 |
| 26 | 3287860880 |
| 27 | 3287860889 |
| 28 | 3287860895 |
| 29 | 3287860897 |
[1,2,3,18,42,95,524,273585,1735537,4406057, 4406063,4406188,4406196,4406341,4406539,4406541, 28703894,73694240,73694281,73694287,73694360, 73694363,73694410,3287860772,3287860773, 3287860880,3287860889,3287860895,3287860897] |