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| n | a(n) |
|---|---|
| 1 | 25 |
| 2 | 288 |
| 3 | 1504 |
| 4 | 7656 |
| 5 | 38096 |
| 6 | 190308 |
| 7 | 953072 |
| 8 | 4776628 |
| 9 | 23912032 |
| 10 | 119676172 |
| 11 | 599079504 |
| 12 | 2999395220 |
| 13 | 15015056688 |
| 14 | 75162919892 |
| 15 | 376276088880 |
| 16 | 1883701849404 |
| 17 | 9429821433376 |
| 18 | 47206168911396 |
| 19 | 236319556068624 |
| 20 | 1183033090841396 |
[25,288,1504,7656,38096,190308,953072,4776628, 23912032,119676172,599079504,2999395220, 15015056688,75162919892,376276088880, 1883701849404,9429821433376,47206168911396, 236319556068624,1183033090841396] |