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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 13 |
| 3 | 213 |
| 4 | 9349 |
| 5 | 1222363 |
| 6 | 487150371 |
| 7 | 603841648931 |
| 8 | 2318527339461265 |
| 9 | 27359264067916806101 |
| 10 | 988808811046283595068099 |
| 11 | 109331355810135629946698361371 |
| 12 | 36954917962039884953387868334644457 |
[0,1,13,213,9349,1222363,487150371,603841648931, 2318527339461265,27359264067916806101, 988808811046283595068099, 109331355810135629946698361371, 36954917962039884953387868334644457] |