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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 7 |
| 2 | 74 |
| 3 | 1175 |
| 4 | 24310 |
| 5 | 610897 |
| 6 | 17920356 |
| 7 | 598099077 |
| 8 | 22305598630 |
| 9 | 917158184525 |
| 10 | 41148369048876 |
| 11 | 1997720107411613 |
| 12 | 104241356841544636 |
| 13 | 5813083330109559415 |
| 14 | 344783011379207286920 |
| 15 | 21660231928192698604995 |
| 16 | 1436143861200146476260102 |
| 17 | 100179915387243084700279349 |
[1,7,74,1175,24310,610897,17920356,598099077, 22305598630,917158184525,41148369048876, 1997720107411613,104241356841544636, 5813083330109559415,344783011379207286920, 21660231928192698604995,1436143861200146476260102, 100179915387243084700279349] |