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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 7 |
| 3 | 5 |
| 4 | 15 |
| 5 | 21 |
| 6 | 57 |
| 7 | 119 |
| 8 | 285 |
| 9 | 725 |
| 10 | 1833 |
| 11 | 4807 |
| 12 | 12843 |
| 13 | 34439 |
| 14 | 93327 |
| 15 | 254085 |
| 16 | 693267 |
| 17 | 1896489 |
| 18 | 5194309 |
| 19 | 14237415 |
| 20 | 39049277 |
| 21 | 107136761 |
| 22 | 294009425 |
| 23 | 806965323 |
| 24 | 2215076227 |
| 25 | 6080649203 |
| 26 | 16692824711 |
| 27 | 45826947389 |
| 28 | 125811287255 |
| 29 | 345400728813 |
[1,7,5,15,21,57,119,285,725,1833,4807,12843,34439, 93327,254085,693267,1896489,5194309,14237415, 39049277,107136761,294009425,806965323,2215076227, 6080649203,16692824711,45826947389,125811287255, 345400728813] |