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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 3 |
| 2 | 5 |
| 3 | 14 |
| 4 | 38 |
| 5 | 114 |
| 6 | 360 |
| 7 | 1166 |
| 8 | 3872 |
| 9 | 13094 |
| 10 | 44961 |
| 11 | 156244 |
| 12 | 548636 |
| 13 | 1943333 |
| 14 | 6935817 |
| 15 | 24917586 |
| 16 | 90039163 |
| 17 | 327029681 |
| 18 | 1193258619 |
| 19 | 4371901789 |
| 20 | 16077606949 |
| 21 | 59325057056 |
| 22 | 219579151797 |
| 23 | 815017718383 |
| 24 | 3032959638204 |
| 25 | 11313632991360 |
| 26 | 42295634914403 |
[1,3,5,14,38,114,360,1166,3872,13094,44961,156244, 548636,1943333,6935817,24917586,90039163, 327029681,1193258619,4371901789,16077606949, 59325057056,219579151797,815017718383, 3032959638204,11313632991360,42295634914403] |