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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 144 |
| 2 | 193104 |
| 3 | 16809408 |
| 4 | 397822032 |
| 5 | 4630076640 |
| 6 | 34416785088 |
| 7 | 187487524224 |
| 8 | 814891939920 |
| 9 | 2975535123408 |
| 10 | 9486534607200 |
| 11 | 27053022904128 |
| 12 | 70486183583424 |
| 13 | 169931012132448 |
| 14 | 384163644219264 |
| 15 | 820166796086400 |
[1,144,193104,16809408,397822032,4630076640, 34416785088,187487524224,814891939920, 2975535123408,9486534607200,27053022904128, 70486183583424,169931012132448,384163644219264, 820166796086400] |