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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 59 |
| 3 | 60 |
| 4 | 3539 |
| 5 | 3599 |
| 6 | 212281 |
| 7 | 215880 |
| 8 | 12733321 |
| 9 | 12949201 |
| 10 | 763786979 |
| 11 | 776736180 |
| 12 | 45814485419 |
| 13 | 46591221599 |
| 14 | 2748105338161 |
| 15 | 2794696559760 |
| 16 | 164840505804241 |
| 17 | 167635202364001 |
| 18 | 9887682242916299 |
| 19 | 10055317445280300 |
| 20 | 593096094069173699 |
[1,1,59,60,3539,3599,212281,215880,12733321, 12949201,763786979,776736180,45814485419, 46591221599,2748105338161,2794696559760, 164840505804241,167635202364001,9887682242916299, 10055317445280300,593096094069173699] |