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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 161 |
| 4 | 14575 |
| 5 | 2671669 |
| 6 | 833607138 |
| 7 | 397984073059 |
| 8 | 270609861663900 |
| 9 | 248922595132336125 |
| 10 | 298037055910658382175 |
| 11 | 450755158919281716609746 |
| 12 | 840770855566250627155136090 |
| 13 | 1896671776639253430025972662743 |
| 14 | 5091278095597325836977485757711800 |
| 15 | 16040729445423172146341201903726496024 |
| 16 | 58625927208516621021861960954787323034320 |
| 17 | 246047331971247756894582227572712664877434765 |
| 18 | 1175344062721738572130662103242054758238706829325 |
[1,5,161,14575,2671669,833607138,397984073059, 270609861663900,248922595132336125, 298037055910658382175,450755158919281716609746, 840770855566250627155136090, 1896671776639253430025972662743, 5091278095597325836977485757711800, 16040729445423172146341201903726496024, 58625927208516621021861960954787323034320, 246047331971247756894582227572712664877434765, 1175344062721738572130662103242054758238706829325] |