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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 33 |
| 3 | 141 |
| 4 | 2442 |
| 5 | 50205 |
| 6 | 208857 |
| 7 | 1017701 |
| 8 | 21138612 |
| 9 | 100444001 |
| 10 | 1000450010 |
| 11 | 10006102001 |
| 12 | 210016912512 |
| 13 | 1000098150001 |
| 14 | 20000708510002 |
| 15 | 500000242000005 |
| 16 | 2110000787875112 |
| 17 | 10000014238000001 |
| 18 | 200000094935500002 |
[1,33,141,2442,50205,208857,1017701,21138612, 100444001,1000450010,10006102001,210016912512, 1000098150001,20000708510002,500000242000005, 2110000787875112,10000014238000001, 200000094935500002] |