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| n | a(n) |
|---|---|
| 3 | 19 |
| 4 | 319 |
| 5 | 2816 |
| 6 | 18254 |
| 7 | 99093 |
| 8 | 481821 |
| 9 | 2182330 |
| 10 | 9438700 |
| 11 | 39629855 |
| 12 | 163365899 |
| 13 | 666397044 |
| 14 | 2704448010 |
| 15 | 10958782249 |
| 16 | 44439844153 |
| 17 | 180582177902 |
| 18 | 735754592168 |
| 19 | 3006110373171 |
| 20 | 12314551935015 |
| 21 | 50562464064040 |
| 22 | 207995720870470 |
| 23 | 856862324449469 |
| 24 | 3533636612529749 |
[19,319,2816,18254,99093,481821,2182330,9438700, 39629855,163365899,666397044,2704448010, 10958782249,44439844153,180582177902,735754592168, 3006110373171,12314551935015,50562464064040, 207995720870470,856862324449469,3533636612529749] |