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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 29 |
| 2 | 435 |
| 3 | 4494 |
| 4 | 35931 |
| 5 | 236901 |
| 6 | 1340408 |
| 7 | 6688531 |
| 8 | 30022569 |
| 9 | 123054221 |
| 10 | 465973276 |
| 11 | 1645558368 |
| 12 | 5461104956 |
| 13 | 17140618084 |
| 14 | 51153912696 |
| 15 | 145821399597 |
| 16 | 398621995827 |
| 17 | 1048532319201 |
| 18 | 2661833593149 |
| 19 | 6538864924476 |
| 20 | 15579750854262 |
[1,29,435,4494,35931,236901,1340408,6688531, 30022569,123054221,465973276,1645558368, 5461104956,17140618084,51153912696,145821399597, 398621995827,1048532319201,2661833593149, 6538864924476,15579750854262] |