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| n | a(n) |
|---|---|
| 0 | 11 |
| 1 | 31 |
| 2 | 151 |
| 3 | 911 |
| 4 | 5951 |
| 5 | 40051 |
| 6 | 272611 |
| 7 | 1863551 |
| 8 | 12760031 |
| 9 | 87424711 |
| 10 | 599129311 |
| 11 | 4106261531 |
| 12 | 28144128251 |
| 13 | 192901135711 |
| 14 | 1322159893351 |
| 15 | 9062207833151 |
| 16 | 62113268013311 |
| 17 | 425730597768451 |
| 18 | 2918000731816531 |
| 19 | 20000274041790911 |
| 20 | 137083916295800111 |
| 21 | 939587136717207031 |
| 22 | 6440026032054760351 |
[11,31,151,911,5951,40051,272611,1863551,12760031, 87424711,599129311,4106261531,28144128251, 192901135711,1322159893351,9062207833151, 62113268013311,425730597768451,2918000731816531, 20000274041790911,137083916295800111, 939587136717207031,6440026032054760351] |