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| n | a(n) |
|---|---|
| 1 | 7 |
| 2 | 17 |
| 3 | 67 |
| 4 | 397 |
| 5 | 997 |
| 6 | 4657 |
| 7 | 10687 |
| 8 | 28097 |
| 9 | 39397 |
| 10 | 61057 |
| 11 | 130987 |
| 12 | 250307 |
| 13 | 425417 |
| 14 | 2385157 |
| 15 | 2717567 |
| 16 | 3207857 |
| 17 | 5247257 |
| 18 | 6996377 |
| 19 | 7402237 |
| 20 | 23363167 |
| 21 | 27614507 |
| 22 | 46359967 |
| 23 | 103494037 |
| 24 | 118884947 |
| 25 | 499144627 |
| 26 | 544698487 |
| 27 | 705338497 |
| 28 | 760949557 |
| 29 | 1625986457 |
[7,17,67,397,997,4657,10687,28097,39397,61057, 130987,250307,425417,2385157,2717567,3207857, 5247257,6996377,7402237,23363167,27614507, 46359967,103494037,118884947,499144627,544698487, 705338497,760949557,1625986457] |