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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 1713 |
| 3 | 145208 |
| 4 | 7196852 |
| 5 | 263134490 |
| 6 | 7804657491 |
| 7 | 197112382716 |
| 8 | 4361870602212 |
| 9 | 86190316947578 |
| 10 | 1541836669016245 |
| 11 | 25236090146159518 |
| 12 | 381171321062737412 |
| 13 | 5350587072804920340 |
| 14 | 70218509804475284134 |
| 15 | 865927060368778196406 |
[4,1713,145208,7196852,263134490,7804657491, 197112382716,4361870602212,86190316947578, 1541836669016245,25236090146159518, 381171321062737412,5350587072804920340, 70218509804475284134,865927060368778196406] |