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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 25 |
| 3 | 314 |
| 4 | 4572 |
| 5 | 68385 |
| 6 | 1037326 |
| 7 | 15904038 |
| 8 | 245900395 |
| 9 | 3827698634 |
| 10 | 59908716776 |
| 11 | 941887270541 |
| 12 | 14864346253334 |
| 13 | 235333007557546 |
| 14 | 3736059988845399 |
| 15 | 59453991638435810 |
| 16 | 948103358514285732 |
| 17 | 15147172497271220257 |
[4,25,314,4572,68385,1037326,15904038,245900395, 3827698634,59908716776,941887270541, 14864346253334,235333007557546,3736059988845399, 59453991638435810,948103358514285732, 15147172497271220257] |