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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 3 |
| 3 | 15 |
| 4 | 3 |
| 5 | 23 |
| 6 | 123 |
| 7 | 31 |
| 8 | 99 |
| 9 | 471 |
| 10 | 1755 |
| 11 | 2047 |
| 12 | 6147 |
| 13 | 5879 |
| 14 | 32571 |
| 15 | 607 |
| 16 | 31459 |
| 17 | 40791 |
| 18 | 173019 |
| 19 | 779519 |
| 20 | 1853699 |
| 21 | 771831 |
| 22 | 823099 |
| 23 | 4035167 |
| 24 | 13584611 |
| 25 | 64196951 |
| 26 | 15009755 |
| 27 | 121997567 |
| 28 | 468153603 |
| 29 | 477869815 |
| 30 | 1771962171 |
| 31 | 1940783711 |
| 32 | 7343538403 |
| 33 | 8589884759 |
[1,3,3,15,3,23,123,31,99,471,1755,2047,6147,5879, 32571,607,31459,40791,173019,779519,1853699, 771831,823099,4035167,13584611,64196951,15009755, 121997567,468153603,477869815,1771962171, 1940783711,7343538403,8589884759] |