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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 9135630 |
| 8 | 589985590963930 |
| 9 | 78459796857685317493440 |
| 10 | 23086954810641629693375704674000 |
| 11 | 15464071313054035722739424623204673044920 |
[0,0,0,0,0,1,9135630,589985590963930, 78459796857685317493440, 23086954810641629693375704674000, 15464071313054035722739424623204673044920] |