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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 44 |
| 3 | 171 |
| 4 | 2772 |
| 5 | 50405 |
| 6 | 216612 |
| 7 | 1036301 |
| 8 | 21177112 |
| 9 | 100808001 |
| 10 | 1000900010 |
| 11 | 10011211001 |
| 12 | 210033330012 |
| 13 | 1000175710001 |
| 14 | 20001366310002 |
| 15 | 500000464000005 |
| 16 | 2110001551000112 |
| 17 | 10000027672000001 |
| 18 | 200000187781000002 |
[1,44,171,2772,50405,216612,1036301,21177112, 100808001,1000900010,10011211001,210033330012, 1000175710001,20001366310002,500000464000005, 2110001551000112,10000027672000001, 200000187781000002] |