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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 33 |
| 3 | 333 |
| 4 | 4664 |
| 5 | 51005 |
| 6 | 616506 |
| 7 | 7021007 |
| 8 | 80308008 |
| 9 | 900360009 |
| 10 | 10004950010 |
| 11 | 110005510011 |
| 12 | 1200070620012 |
| 13 | 13000078300013 |
| 14 | 140000961400014 |
| 15 | 1500001055000015 |
| 16 | 16000012606000016 |
| 17 | 170000013670000017 |
| 18 | 1800000160380000018 |
| 19 | 19000000171900000019 |
| 20 | 200000001991000000020 |
[0,33,333,4664,51005,616506,7021007,80308008, 900360009,10004950010,110005510011,1200070620012, 13000078300013,140000961400014,1500001055000015, 16000012606000016,170000013670000017, 1800000160380000018,19000000171900000019, 200000001991000000020] |