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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 23 |
| 4 | 53 |
| 5 | 1523 |
| 6 | 29243 |
| 7 | 299513 |
| 8 | 4383593 |
| 9 | 188677703 |
| 10 | 5765999453 |
| 11 | 5765999453 |
| 12 | 2211931390883 |
| 13 | 165468170356703 |
| 14 | 8075975022064163 |
| 15 | 361310530977154973 |
| 16 | 20037783573808880093 |
| 17 | 1779852341342071295513 |
| 18 | 40235059344426324076913 |
[1,5,23,53,1523,29243,299513,4383593,188677703, 5765999453,5765999453,2211931390883, 165468170356703,8075975022064163, 361310530977154973,20037783573808880093, 1779852341342071295513,40235059344426324076913] |