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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 3 |
| 3 | 11 |
| 4 | 41 |
| 5 | 154 |
| 6 | 582 |
| 7 | 2211 |
| 8 | 8437 |
| 9 | 32318 |
| 10 | 124202 |
| 11 | 478686 |
| 12 | 1849498 |
| 13 | 7161556 |
| 14 | 27784460 |
| 15 | 107980515 |
| 16 | 420300045 |
| 17 | 1638238710 |
| 18 | 6393535170 |
| 19 | 24980504010 |
| 20 | 97704407790 |
| 21 | 382509199020 |
| 22 | 1498824792660 |
| 23 | 5877754713870 |
| 24 | 23067328421826 |
| 25 | 90590960500524 |
| 26 | 356002519839652 |
[1,3,11,41,154,582,2211,8437,32318,124202,478686, 1849498,7161556,27784460,107980515,420300045, 1638238710,6393535170,24980504010,97704407790, 382509199020,1498824792660,5877754713870, 23067328421826,90590960500524,356002519839652] |