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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 30 |
| 3 | 16926 |
| 4 | 2593962 |
| 5 | 281740616 |
| 6 | 33169633760 |
| 7 | 3934875952932 |
| 8 | 468738681959950 |
| 9 | 55761205442553620 |
| 10 | 6632928807891253950 |
| 11 | 788965363164447297996 |
| 12 | 93846883723526687128242 |
| 13 | 11163030352379441952730540 |
[0,30,16926,2593962,281740616,33169633760, 3934875952932,468738681959950,55761205442553620, 6632928807891253950,788965363164447297996, 93846883723526687128242, 11163030352379441952730540] |