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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 25 |
| 3 | 1105 |
| 4 | 12025 |
| 5 | 21025 |
| 6 | 66625 |
| 7 | 252601 |
| 8 | 292825 |
| 9 | 751825 |
| 10 | 1026745 |
| 11 | 1671865 |
| 12 | 1892185 |
| 13 | 4210945 |
| 14 | 4534945 |
| 15 | 8529625 |
| 16 | 8958625 |
| 17 | 10251025 |
| 18 | 16040401 |
| 19 | 24019801 |
| 20 | 28404025 |
| 21 | 29138425 |
| 22 | 29604625 |
| 23 | 47859265 |
| 24 | 51396865 |
| 25 | 53438905 |
| 26 | 62747425 |
[1,25,1105,12025,21025,66625,252601,292825,751825, 1026745,1671865,1892185,4210945,4534945,8529625, 8958625,10251025,16040401,24019801,28404025, 29138425,29604625,47859265,51396865,53438905, 62747425] |