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| n | a(n) |
|---|---|
| 0 | 3 |
| 1 | 3 |
| 2 | 147 |
| 3 | 3576 |
| 4 | 22812 |
| 5 | 50616 |
| 6 | 1235107 |
| 7 | 8226931 |
| 8 | 37066147 |
| 9 | 107991483 |
| 10 | 2302145628 |
| 11 | 8174839347 |
| 12 | 107602297939 |
| 13 | 145628072796 |
| 14 | 7135775567004 |
| 15 | 48192192640248 |
| 16 | 251191768371228 |
| 17 | 2460676852185676 |
| 18 | 17172107878050712 |
| 19 | 117625880871152716 |
| 20 | 697016326613157592 |
| 21 | 4598330960283656403 |
[3,3,147,3576,22812,50616,1235107,8226931, 37066147,107991483,2302145628,8174839347, 107602297939,145628072796,7135775567004, 48192192640248,251191768371228,2460676852185676, 17172107878050712,117625880871152716, 697016326613157592,4598330960283656403] |