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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 313 |
| 3 | 2625 |
| 4 | 16641 |
| 5 | 85305 |
| 6 | 369305 |
| 7 | 1392065 |
| 8 | 4673345 |
| 9 | 14218905 |
| 10 | 39753273 |
| 11 | 103274625 |
| 12 | 251595969 |
| 13 | 579168825 |
| 14 | 1267854873 |
| 15 | 2653649025 |
| 16 | 5334940545 |
| 17 | 10343052825 |
| 18 | 19403906105 |
| 19 | 35330137025 |
| 20 | 62596382081 |
| 21 | 108167252025 |
| 22 | 182668423833 |
| 23 | 302016962625 |
| 24 | 489658242241 |
[1,25,313,2625,16641,85305,369305,1392065,4673345, 14218905,39753273,103274625,251595969,579168825, 1267854873,2653649025,5334940545,10343052825, 19403906105,35330137025,62596382081,108167252025, 182668423833,302016962625,489658242241] |