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| n | a(n) |
|---|---|
| 1 | 972 |
| 2 | 36864 |
| 3 | 34992 |
| 4 | 63504 |
| 5 | 137088 |
| 6 | 331776 |
| 7 | 829440 |
| 8 | 1806336 |
| 9 | 3852288 |
| 10 | 8294400 |
| 11 | 18137088 |
| 12 | 40144896 |
| 13 | 88897536 |
| 14 | 196448256 |
| 15 | 433465344 |
| 16 | 955551744 |
| 17 | 2106667008 |
| 18 | 4645785600 |
| 19 | 10246588416 |
| 20 | 22600912896 |
| 21 | 49849804800 |
| 22 | 109947949056 |
[972,36864,34992,63504,137088,331776,829440, 1806336,3852288,8294400,18137088,40144896, 88897536,196448256,433465344,955551744,2106667008, 4645785600,10246588416,22600912896,49849804800, 109947949056] |