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| n | a(n) |
|---|---|
| 1 | 472 |
| 2 | 10834 |
| 3 | 147984 |
| 4 | 1161050 |
| 5 | 6143828 |
| 6 | 25889916 |
| 7 | 89105036 |
| 8 | 265355962 |
| 9 | 703196860 |
| 10 | 1697573454 |
| 11 | 3791220900 |
| 12 | 7939541008 |
| 13 | 15724825316 |
| 14 | 29686208288 |
| 15 | 53758774120 |
| 16 | 93865133098 |
| 17 | 158683717456 |
| 18 | 260719421940 |
| 19 | 417432211296 |
| 20 | 652964625866 |
[472,10834,147984,1161050,6143828,25889916, 89105036,265355962,703196860,1697573454, 3791220900,7939541008,15724825316,29686208288, 53758774120,93865133098,158683717456,260719421940, 417432211296,652964625866] |