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| n | a(n) |
|---|---|
| 1 | 256 |
| 2 | 81 |
| 3 | 289 |
| 4 | 1024 |
| 5 | 3721 |
| 6 | 13456 |
| 7 | 49284 |
| 8 | 179776 |
| 9 | 660969 |
| 10 | 2421136 |
| 11 | 8916196 |
| 12 | 32729841 |
| 13 | 120604324 |
| 14 | 443228809 |
| 15 | 1633453056 |
| 16 | 6007025025 |
| 17 | 22136976225 |
| 18 | 81441744400 |
| 19 | 300095796100 |
| 20 | 1104340367376 |
| 21 | 4068797299876 |
| 22 | 14975700324025 |
| 23 | 55170296484241 |
[256,81,289,1024,3721,13456,49284,179776,660969, 2421136,8916196,32729841,120604324,443228809, 1633453056,6007025025,22136976225,81441744400, 300095796100,1104340367376,4068797299876, 14975700324025,55170296484241] |