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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 12 |
| 4 | 233 |
| 5 | 13027 |
| 6 | 2054860 |
| 7 | 902972232 |
| 8 | 1088301119016 |
| 9 | 3548682190216501 |
| 10 | 30975390230263001230 |
| 11 | 718172054909597874684616 |
| 12 | 43989826242167986964609396098 |
| 13 | 7092859798789990177772152185478717 |
[1,2,12,233,13027,2054860,902972232,1088301119016, 3548682190216501,30975390230263001230, 718172054909597874684616, 43989826242167986964609396098, 7092859798789990177772152185478717] |