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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 5 |
| 3 | 24 |
| 4 | 96 |
| 5 | 176 |
| 6 | 625 |
| 7 | 1316 |
| 8 | 13025 |
| 9 | 0 |
| 10 | 14129 |
| 11 | 24161 |
| 12 | 580921 |
| 13 | 1310976 |
| 14 | 4588964 |
| 15 | 7007601 |
| 16 | 0 |
| 17 | 233634401 |
| 18 | 244436761 |
| 19 | 2180575376 |
| 20 | 3762025 |
| 21 | 23492302009 |
| 22 | 71829444801 |
| 23 | 293908889924 |
| 24 | 357018382249 |
| 25 | 2562501107225 |
| 26 | 2194311769649 |
[0,5,24,96,176,625,1316,13025,0,14129,24161, 580921,1310976,4588964,7007601,0,233634401, 244436761,2180575376,3762025,23492302009, 71829444801,293908889924,357018382249, 2562501107225,2194311769649] |