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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 21 |
| 5 | 381 |
| 6 | 903 |
| 7 | 921 |
| 8 | 2667 |
| 9 | 5789 |
| 10 | 6447 |
| 11 | 17367 |
| 12 | 18543 |
| 13 | 73703 |
| 14 | 114681 |
| 15 | 116967 |
| 16 | 208443 |
| 17 | 221109 |
| 18 | 277221 |
| 19 | 746781 |
| 20 | 797349 |
| 21 | 818769 |
| 22 | 855141 |
| 23 | 871347 |
| 24 | 1459101 |
| 25 | 2205609 |
| 26 | 2354961 |
| 27 | 5090367 |
| 28 | 5331669 |
| 29 | 5692701 |
| 30 | 6099429 |
| 31 | 7611387 |
| 32 | 8710041 |
[1,3,7,21,381,903,921,2667,5789,6447,17367,18543, 73703,114681,116967,208443,221109,277221,746781, 797349,818769,855141,871347,1459101,2205609, 2354961,5090367,5331669,5692701,6099429,7611387, 8710041] |