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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 25 |
| 2 | 163 |
| 3 | 1085 |
| 4 | 7275 |
| 5 | 48993 |
| 6 | 330875 |
| 7 | 2239053 |
| 8 | 15174303 |
| 9 | 102954301 |
| 10 | 699137069 |
| 11 | 4750953363 |
| 12 | 32302586991 |
| 13 | 219726864037 |
| 14 | 1495133067339 |
| 15 | 10176462578315 |
| 16 | 69280311235399 |
| 17 | 471736449047969 |
| 18 | 3212552110817705 |
| 19 | 21880121177493973 |
[1,25,163,1085,7275,48993,330875,2239053,15174303, 102954301,699137069,4750953363,32302586991, 219726864037,1495133067339,10176462578315, 69280311235399,471736449047969,3212552110817705, 21880121177493973] |