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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 30 |
| 4 | 1099 |
| 5 | 369267 |
| 6 | 1299735768 |
| 7 | 55209313116171 |
| 8 | 32401252746609874301 |
| 9 | 297072994236730724952120013 |
| 10 | 47538200124908778784793653003318415 |
| 11 | 146779873670882872946054150750588724458499598 |
| 12 | 9581411392466176519699106616122834087912451590912289450 |
[1,2,5,30,1099,369267,1299735768,55209313116171, 32401252746609874301,297072994236730724952120013, 47538200124908778784793653003318415, 146779873670882872946054150750588724458499598, 95814113924661765196991066161228340879124515909122\ 89450] |