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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 8 |
| 4 | 32 |
| 5 | 89 |
| 6 | 309 |
| 7 | 1392 |
| 8 | 2464 |
| 9 | 12241 |
| 10 | 23685 |
| 11 | 66936 |
| 12 | 329856 |
| 13 | 598377 |
| 14 | 2972885 |
| 15 | 4204000 |
| 16 | 17321536 |
| 17 | 47254689 |
| 18 | 156943365 |
| 19 | 737779176 |
| 20 | 1276350496 |
| 21 | 6369950073 |
| 22 | 12290868597 |
| 23 | 35051319632 |
| 24 | 175157734688 |
| 25 | 319624706161 |
| 26 | 1569854375813 |
| 27 | 2311734655064 |
| 28 | 9333158201280 |
| 29 | 25600877525257 |
[1,5,8,32,89,309,1392,2464,12241,23685,66936, 329856,598377,2972885,4204000,17321536,47254689, 156943365,737779176,1276350496,6369950073, 12290868597,35051319632,175157734688,319624706161, 1569854375813,2311734655064,9333158201280, 25600877525257] |