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| n | a(n) |
|---|---|
| 7 | 1 |
| 8 | 441 |
| 9 | 75925 |
| 10 | 8578141 |
| 11 | 770326261 |
| 12 | 60382944557 |
| 13 | 4354460873140 |
| 14 | 298289430051783 |
| 15 | 19813818173777554 |
| 16 | 1293896099147297543 |
| 17 | 83854915293853035939 |
| 18 | 5428948347175827772212 |
| 19 | 352760125552869025028101 |
| 20 | 23080802877533824013396648 |
| 21 | 1524202621890583618051482051 |
[1,441,75925,8578141,770326261,60382944557, 4354460873140,298289430051783,19813818173777554, 1293896099147297543,83854915293853035939, 5428948347175827772212,352760125552869025028101, 23080802877533824013396648, 1524202621890583618051482051] |