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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 156 |
| 3 | 1504 |
| 4 | 46554 |
| 5 | 1403180 |
| 6 | 41783272 |
| 7 | 1143560054 |
| 8 | 33208175412 |
| 9 | 969060086041 |
| 10 | 27837178102892 |
| 11 | 803673472569032 |
| 12 | 23256923981563742 |
| 13 | 674524256763682334 |
| 14 | 19550711000003604408 |
| 15 | 566822525420474738122 |
| 16 | 16437935130362734259568 |
[0,156,1504,46554,1403180,41783272,1143560054, 33208175412,969060086041,27837178102892, 803673472569032,23256923981563742, 674524256763682334,19550711000003604408, 566822525420474738122,16437935130362734259568] |