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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 374 |
| 4 | 173891 |
| 5 | 117392909 |
| 6 | 117108036719 |
| 7 | 171248808285596 |
| 8 | 360953073372968159 |
| 9 | 1072323973643442736211 |
| 10 | 4376906243609822466600689 |
| 11 | 23919710914189027455648239834 |
| 12 | 170865299381465355439286870245691 |
| 13 | 1561721420156259852074018974532765369 |
[0,0,1,374,173891,117392909,117108036719, 171248808285596,360953073372968159, 1072323973643442736211,4376906243609822466600689, 23919710914189027455648239834, 170865299381465355439286870245691, 1561721420156259852074018974532765369] |