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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 5 |
| 4 | 15 |
| 5 | 37 |
| 6 | 123 |
| 7 | 369 |
| 8 | 1215 |
| 9 | 3873 |
| 10 | 13439 |
| 11 | 46389 |
| 12 | 166211 |
| 13 | 587241 |
| 14 | 2139343 |
| 15 | 7853281 |
| 16 | 29436835 |
| 17 | 110256257 |
| 18 | 417088191 |
| 19 | 1589755941 |
| 20 | 6134996203 |
| 21 | 23788716713 |
| 22 | 92647968427 |
| 23 | 362538770889 |
| 24 | 1429592471767 |
| 25 | 5669395402541 |
| 26 | 22564924805887 |
| 27 | 90077402253757 |
| 28 | 361286842382159 |
| 29 | 1456188214956373 |
| 30 | 5890364709523459 |
[1,1,3,5,15,37,123,369,1215,3873,13439,46389, 166211,587241,2139343,7853281,29436835,110256257, 417088191,1589755941,6134996203,23788716713, 92647968427,362538770889,1429592471767, 5669395402541,22564924805887,90077402253757, 361286842382159,1456188214956373,5890364709523459] |