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| n | a(n) |
|---|---|
| 1 | 17 |
| 2 | 153 |
| 3 | 1289 |
| 4 | 10521 |
| 5 | 84809 |
| 6 | 680409 |
| 7 | 5449097 |
| 8 | 43610265 |
| 9 | 348934601 |
| 10 | 2791634265 |
| 11 | 22333546505 |
| 12 | 178669789209 |
| 13 | 1429362565193 |
| 14 | 11434913276121 |
| 15 | 91479344472713 |
| 16 | 731834870572953 |
| 17 | 5854679308957385 |
| 18 | 46837435504780377 |
| 19 | 374699487137606921 |
| 20 | 2997595906398947097 |
| 21 | 23980767279085851977 |
[17,153,1289,10521,84809,680409,5449097,43610265, 348934601,2791634265,22333546505,178669789209, 1429362565193,11434913276121,91479344472713, 731834870572953,5854679308957385, 46837435504780377,374699487137606921, 2997595906398947097,23980767279085851977] |