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| n | a(n) |
|---|---|
| 1 | 62480 |
| 2 | 1432640 |
| 3 | 7660880 |
| 4 | 27931280 |
| 5 | 39685376 |
| 6 | 116636864 |
| 7 | 179299575 |
| 8 | 318523136 |
| 9 | 4794813680 |
| 10 | 4483640576 |
| 11 | 4773473775 |
| 12 | 6100571295 |
| 13 | 7076217500 |
| 14 | 12475715175 |
| 15 | 17094480975 |
| 16 | 15069863936 |
| 17 | 21699524864 |
| 18 | 24011966300 |
| 19 | 30304399616 |
[62480,1432640,7660880,27931280,39685376, 116636864,179299575,318523136,4794813680, 4483640576,4773473775,6100571295,7076217500, 12475715175,17094480975,15069863936,21699524864, 24011966300,30304399616] |