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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 65 |
| 3 | 57 |
| 4 | 230 |
| 5 | 1094 |
| 6 | 4315 |
| 7 | 18032 |
| 8 | 75491 |
| 9 | 325547 |
| 10 | 1416774 |
| 11 | 6187701 |
| 12 | 27013886 |
| 13 | 117918230 |
| 14 | 514866750 |
| 15 | 2248861295 |
| 16 | 9826797188 |
| 17 | 42947569488 |
| 18 | 187715747196 |
| 19 | 820514753565 |
| 20 | 3586597539334 |
| 21 | 15677880073962 |
| 22 | 68532680245349 |
[1,65,57,230,1094,4315,18032,75491,325547,1416774, 6187701,27013886,117918230,514866750,2248861295, 9826797188,42947569488,187715747196,820514753565, 3586597539334,15677880073962,68532680245349] |