| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 7 |
| 6 | 19 |
| 7 | 68 |
| 8 | 44 |
| 9 | 416 |
| 10 | 758 |
| 11 | 6092 |
| 12 | 24284 |
| 13 | 10348 |
| 14 | 110864 |
| 15 | 997828 |
| 16 | 4545476 |
| 17 | 827252 |
| 18 | 5166356 |
| 19 | 255994804 |
| 20 | 1289266004 |
| 21 | 3332578444 |
| 22 | 8757252244 |
| 23 | 3766552348 |
| 24 | 27079574548 |
| 25 | 1434303566956 |
| 26 | 4061479240156 |
| 27 | 46849154788124 |
| 28 | 54858398447372 |
| 29 | 816458740546228 |
| 30 | 189647639388428 |
[1,1,2,4,7,19,68,44,416,758,6092,24284,10348, 110864,997828,4545476,827252,5166356,255994804, 1289266004,3332578444,8757252244,3766552348, 27079574548,1434303566956,4061479240156, 46849154788124,54858398447372,816458740546228, 189647639388428] |