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| n | a(n) |
|---|---|
| 1 | 36 |
| 2 | 864 |
| 3 | 21060 |
| 4 | 544320 |
| 5 | 14466276 |
| 6 | 388481184 |
| 7 | 10469912580 |
| 8 | 282515610240 |
| 9 | 7626372266916 |
| 10 | 205898105486304 |
| 11 | 5559123328143300 |
| 12 | 150095200154477760 |
| 13 | 4052560236745849956 |
| 14 | 109419034885082920224 |
| 15 | 2954313118333054841220 |
[36,864,21060,544320,14466276,388481184, 10469912580,282515610240,7626372266916, 205898105486304,5559123328143300, 150095200154477760,4052560236745849956, 109419034885082920224,2954313118333054841220] |