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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 257 |
| 3 | 6562 |
| 4 | 65793 |
| 5 | 390626 |
| 6 | 843217 |
| 7 | 5764802 |
| 8 | 16843009 |
| 9 | 43053283 |
| 10 | 50195441 |
| 11 | 214358882 |
| 12 | 71955611 |
| 13 | 815730722 |
| 14 | 740777057 |
| 15 | 2563287812 |
| 16 | 4311810305 |
| 17 | 6975757442 |
| 18 | 11064693731 |
| 19 | 16983563042 |
| 20 | 12850228209 |
| 21 | 37828630724 |
| 22 | 27545116337 |
| 23 | 78310985282 |
| 24 | 55261912529 |
| 25 | 152588281251 |
[1,257,6562,65793,390626,843217,5764802,16843009, 43053283,50195441,214358882,71955611,815730722, 740777057,2563287812,4311810305,6975757442, 11064693731,16983563042,12850228209,37828630724, 27545116337,78310985282,55261912529,152588281251] |