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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 1 |
| 3 | 7 |
| 4 | 9 |
| 5 | 31 |
| 6 | 9 |
| 7 | 63 |
| 8 | 193 |
| 9 | 335 |
| 10 | 761 |
| 11 | 1807 |
| 12 | 3057 |
| 13 | 7199 |
| 14 | 12265 |
| 15 | 28703 |
| 16 | 45921 |
| 17 | 129711 |
| 18 | 132441 |
| 19 | 449199 |
| 20 | 634321 |
| 21 | 2051775 |
| 22 | 2422601 |
| 23 | 8338175 |
| 24 | 9690369 |
| 25 | 33386255 |
| 26 | 38458169 |
| 27 | 133513167 |
| 28 | 153863409 |
| 29 | 536632863 |
| 30 | 605009897 |
| 31 | 2087739423 |
| 32 | 2679974753 |
| 33 | 8066421423 |
| 34 | 9260252505 |
[1,3,1,7,9,31,9,63,193,335,761,1807,3057,7199, 12265,28703,45921,129711,132441,449199,634321, 2051775,2422601,8338175,9690369,33386255,38458169, 133513167,153863409,536632863,605009897, 2087739423,2679974753,8066421423,9260252505] |