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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 7 |
| 3 | 38 |
| 4 | 301 |
| 5 | 3224 |
| 6 | 44021 |
| 7 | 735216 |
| 8 | 14580195 |
| 9 | 335762290 |
| 10 | 8824804889 |
| 11 | 261084641178 |
| 12 | 8597298494025 |
| 13 | 312159531050382 |
| 14 | 12399137504630097 |
| 15 | 535147013379083822 |
| 16 | 24950976908580696095 |
| 17 | 1250331101054276584968 |
[1,2,7,38,301,3224,44021,735216,14580195, 335762290,8824804889,261084641178,8597298494025, 312159531050382,12399137504630097, 535147013379083822,24950976908580696095, 1250331101054276584968] |