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| n | a(n) |
|---|---|
| 1 | 8 |
| 2 | 25 |
| 3 | 119 |
| 4 | 484 |
| 5 | 2117 |
| 6 | 9025 |
| 7 | 38936 |
| 8 | 167281 |
| 9 | 720083 |
| 10 | 3097600 |
| 11 | 13329209 |
| 12 | 57350329 |
| 13 | 246768392 |
| 14 | 1061782225 |
| 15 | 4568619071 |
| 16 | 19657722436 |
| 17 | 84582794333 |
| 18 | 363940725625 |
| 19 | 1565955363224 |
| 20 | 6737954403049 |
| 21 | 28991906279867 |
| 22 | 124745667481600 |
[8,25,119,484,2117,9025,38936,167281,720083, 3097600,13329209,57350329,246768392,1061782225, 4568619071,19657722436,84582794333,363940725625, 1565955363224,6737954403049,28991906279867, 124745667481600] |