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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 22 |
| 2 | 308 |
| 3 | 638 |
| 4 | 3696 |
| 5 | 4212 |
| 6 | 18480 |
| 7 | 26400 |
| 8 | 55080 |
| 9 | 52800 |
| 10 | 73920 |
| 11 | 108108 |
| 12 | 220320 |
| 13 | 216216 |
| 14 | 275400 |
| 15 | 324324 |
| 16 | 432432 |
| 17 | 550800 |
| 18 | 734400 |
| 19 | 1908000 |
| 20 | 1144800 |
| 21 | 1101600 |
| 22 | 1377000 |
| 23 | 1652400 |
| 24 | 3027024 |
| 25 | 2203200 |
| 26 | 4039200 |
| 27 | 2754000 |
| 28 | 3304800 |
| 29 | 5724000 |
| 30 | 6528600 |
| 31 | 9180000 |
| 32 | 8586000 |
| 33 | 5508000 |
[1,22,308,638,3696,4212,18480,26400,55080,52800, 73920,108108,220320,216216,275400,324324,432432, 550800,734400,1908000,1144800,1101600,1377000, 1652400,3027024,2203200,4039200,2754000,3304800, 5724000,6528600,9180000,8586000,5508000] |