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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 13 |
| 3 | 469 |
| 4 | 32985 |
| 5 | 3818601 |
| 6 | 658371429 |
| 7 | 158197312701 |
| 8 | 50529852678321 |
| 9 | 20707179214389201 |
| 10 | 10591085815045781949 |
| 11 | 6613325759240221954725 |
| 12 | 4951199941339632477906825 |
| 13 | 4377912560491798717856660025 |
[1,1,13,469,32985,3818601,658371429,158197312701, 50529852678321,20707179214389201, 10591085815045781949,6613325759240221954725, 4951199941339632477906825, 4377912560491798717856660025] |