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| n | a(n) |
|---|---|
| 1 | 27 |
| 2 | 588 |
| 3 | 588 |
| 4 | 12900 |
| 5 | 28086 |
| 6 | 12900 |
| 7 | 282672 |
| 8 | 1367896 |
| 9 | 1367896 |
| 10 | 282672 |
| 11 | 6195480 |
| 12 | 66642628 |
| 13 | 151319356 |
| 14 | 66642628 |
| 15 | 6195480 |
| 16 | 135783240 |
| 17 | 3246601822 |
| 18 | 16772497838 |
| 19 | 16772497838 |
| 20 | 3246601822 |
| 21 | 135783240 |
| 22 | 2975926392 |
| 23 | 158165462152 |
| 24 | 1859643383374 |
[27,588,588,12900,28086,12900,282672,1367896, 1367896,282672,6195480,66642628,151319356, 66642628,6195480,135783240,3246601822,16772497838, 16772497838,3246601822,135783240,2975926392, 158165462152,1859643383374] |