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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1300 |
| 2 | 239252 |
| 3 | 14797120 |
| 4 | 410468500 |
| 5 | 6030043240 |
| 6 | 54177864000 |
| 7 | 343594659200 |
| 8 | 1706685733012 |
| 9 | 7010460268500 |
| 10 | 24832297608040 |
| 11 | 77924078814400 |
| 12 | 221394909419840 |
| 13 | 578472382307304 |
| 14 | 1407681394953600 |
| 15 | 3221568346322560 |
| 16 | 6988918697572500 |
| 17 | 14466438251512104 |
[1,1300,239252,14797120,410468500,6030043240, 54177864000,343594659200,1706685733012, 7010460268500,24832297608040,77924078814400, 221394909419840,578472382307304,1407681394953600, 3221568346322560,6988918697572500, 14466438251512104] |