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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 26 |
| 3 | 732 |
| 4 | 116390 |
| 5 | 74067484 |
| 6 | 206309321188 |
| 7 | 2332635556428984 |
| 8 | 108379291296448423558 |
| 9 | 20417630652420537229303340 |
| 10 | 15592143220454380480367922739340 |
[1,2,26,732,116390,74067484,206309321188, 2332635556428984,108379291296448423558, 20417630652420537229303340, 15592143220454380480367922739340] |