| n | a(n) |
|---|---|
| 1 | 704 |
| 2 | 13440 |
| 3 | 253312 |
| 4 | 4615296 |
| 5 | 86388160 |
| 6 | 1613838400 |
| 7 | 30161413056 |
| 8 | 563483938112 |
| 9 | 10530498631296 |
| 10 | 196771080244352 |
| 11 | 3677047553720384 |
| 12 | 68710487850849472 |
| 13 | 1283968202554236992 |
| 14 | 23992859339683816000 |
| 15 | 448344090383733286912 |
[704,13440,253312,4615296,86388160,1613838400, 30161413056,563483938112,10530498631296, 196771080244352,3677047553720384, 68710487850849472,1283968202554236992, 23992859339683816000,448344090383733286912] |