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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 10 |
| 3 | 41 |
| 4 | 233 |
| 5 | 1156 |
| 6 | 6048 |
| 7 | 30973 |
| 8 | 159968 |
| 9 | 823413 |
| 10 | 4244066 |
| 11 | 21863362 |
| 12 | 112652884 |
| 13 | 580406183 |
| 14 | 2990444375 |
| 15 | 15407563307 |
| 16 | 79384245250 |
| 17 | 409009933399 |
| 18 | 2107335620744 |
| 19 | 10857590040499 |
| 20 | 55941385316549 |
| 21 | 288225882117252 |
| 22 | 1485021507246365 |
[1,10,41,233,1156,6048,30973,159968,823413, 4244066,21863362,112652884,580406183,2990444375, 15407563307,79384245250,409009933399, 2107335620744,10857590040499,55941385316549, 288225882117252,1485021507246365] |