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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 5 |
| 2 | 22 |
| 3 | 12 |
| 4 | 210 |
| 5 | 176 |
| 6 | 1520 |
| 7 | 1080 |
| 8 | 8400 |
| 9 | 55200 |
| 10 | 273280 |
| 11 | 43776 |
| 12 | 2624832 |
| 13 | 7173360 |
| 14 | 71660160 |
| 15 | 100659200 |
| 16 | 34255872 |
| 17 | 178962432 |
| 18 | 3623854080 |
| 19 | 17895751680 |
| 20 | 5413478400 |
| 21 | 43690752000 |
| 22 | 927712542720 |
| 23 | 733008101376 |
| 24 | 1789570252800 |
| 25 | 35917382287360 |
| 26 | 50649120571392 |
[1,5,22,12,210,176,1520,1080,8400,55200,273280, 43776,2624832,7173360,71660160,100659200,34255872, 178962432,3623854080,17895751680,5413478400, 43690752000,927712542720,733008101376, 1789570252800,35917382287360,50649120571392] |