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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 30 |
| 2 | 2055 |
| 3 | 72981 |
| 4 | 1894152 |
| 5 | 40923980 |
| 6 | 787459878 |
| 7 | 14036460424 |
| 8 | 237625842970 |
| 9 | 3884975468811 |
| 10 | 62058326321705 |
| 11 | 976716375311644 |
| 12 | 15239669683840839 |
| 13 | 236829386474487105 |
| 14 | 3678614595066520977 |
| 15 | 57267281252557106640 |
| 16 | 895416816962839208088 |
| 17 | 14085236951354534551476 |
[0,30,2055,72981,1894152,40923980,787459878, 14036460424,237625842970,3884975468811, 62058326321705,976716375311644,15239669683840839, 236829386474487105,3678614595066520977, 57267281252557106640,895416816962839208088, 14085236951354534551476] |