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| n | a(n) |
|---|---|
| 1 | 41 |
| 2 | 109 |
| 3 | 221 |
| 4 | 629 |
| 5 | 1285 |
| 6 | 3665 |
| 7 | 7489 |
| 8 | 21361 |
| 9 | 43649 |
| 10 | 124501 |
| 11 | 254405 |
| 12 | 725645 |
| 13 | 1482781 |
| 14 | 4229369 |
| 15 | 8642281 |
| 16 | 24650569 |
| 17 | 50370905 |
| 18 | 143674045 |
| 19 | 293583149 |
| 20 | 837393701 |
| 21 | 1711127989 |
| 22 | 4880688161 |
| 23 | 9973184785 |
| 24 | 28446735265 |
| 25 | 58127980721 |
[41,109,221,629,1285,3665,7489,21361,43649,124501, 254405,725645,1482781,4229369,8642281,24650569, 50370905,143674045,293583149,837393701,1711127989, 4880688161,9973184785,28446735265,58127980721] |