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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 22 |
| 3 | 121 |
| 4 | 1331 |
| 5 | 10401 |
| 6 | 105501 |
| 7 | 1006001 |
| 8 | 10077001 |
| 9 | 100080001 |
| 10 | 1000990001 |
| 11 | 10001010001 |
| 12 | 100011110001 |
| 13 | 1000012100001 |
| 14 | 10000133100001 |
| 15 | 100000141000001 |
| 16 | 1000001551000001 |
| 17 | 10000001610000001 |
| 18 | 100000017710000001 |
| 19 | 1000000018100000001 |
| 20 | 10000000199100000001 |
| 21 | 100000000202000000001 |
[0,22,121,1331,10401,105501,1006001,10077001, 100080001,1000990001,10001010001,100011110001, 1000012100001,10000133100001,100000141000001, 1000001551000001,10000001610000001, 100000017710000001,1000000018100000001, 10000000199100000001,100000000202000000001] |