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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 24 |
| 2 | 297 |
| 3 | 3210 |
| 4 | 32510 |
| 5 | 318171 |
| 6 | 3054100 |
| 7 | 28980565 |
| 8 | 273077443 |
| 9 | 2562036673 |
| 10 | 23973009386 |
| 11 | 223949654108 |
| 12 | 2090070431683 |
| 13 | 19496003736658 |
| 14 | 181815760387221 |
| 15 | 1695523268254637 |
| 16 | 15813185728272754 |
| 17 | 147508341317700463 |
[1,24,297,3210,32510,318171,3054100,28980565, 273077443,2562036673,23973009386,223949654108, 2090070431683,19496003736658,181815760387221, 1695523268254637,15813185728272754, 147508341317700463] |