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| n | a(n) |
|---|---|
| 1 | 4 |
| 2 | 17 |
| 3 | 84 |
| 4 | 545 |
| 5 | 7824 |
| 6 | 281771 |
| 7 | 51540600 |
| 8 | 3347558057 |
| 9 | 1146374959980 |
| 10 | 288113965730819 |
| 11 | 529172633067826888 |
| 12 | 283453407513524913023 |
| 13 | 4122282265785671687518812 |
| 14 | 1586581830624893452605127040309 |
| 15 | 412109111737176949907195758658736 |
[4,17,84,545,7824,281771,51540600,3347558057, 1146374959980,288113965730819,529172633067826888, 283453407513524913023,4122282265785671687518812, 1586581830624893452605127040309, 412109111737176949907195758658736] |