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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 30 |
| 2 | 1200 |
| 3 | 70000 |
| 4 | 5880000 |
| 5 | 691488000 |
| 6 | 110638080000 |
| 7 | 23471078400000 |
| 8 | 6454546560000000 |
| 9 | 2256222608640000000 |
| 10 | 985518035453952000000 |
| 11 | 529939925428193280000000 |
| 12 | 346227417946419609600000000 |
| 13 | 271655358696421539840000000000 |
| 14 | 253338025938605687439360000000000 |
| 15 | 278215820085776765945905152000000000 |
| 16 | 356811789260008702325623357440000000000 |
[1,30,1200,70000,5880000,691488000,110638080000, 23471078400000,6454546560000000, 2256222608640000000,985518035453952000000, 529939925428193280000000, 346227417946419609600000000, 271655358696421539840000000000, 253338025938605687439360000000000, 278215820085776765945905152000000000, 356811789260008702325623357440000000000] |