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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 79 |
| 3 | 1837 |
| 4 | 66021 |
| 5 | 3374176 |
| 6 | 231848191 |
| 7 | 20570267229 |
| 8 | 2285620096717 |
| 9 | 310524073877026 |
| 10 | 50598503336716611 |
| 11 | 9732804817777566361 |
| 12 | 2180831456691952213969 |
| 13 | 562835395375423511668692 |
| 14 | 165687992856606963112408291 |
| 15 | 55166524646338775672718351481 |
| 16 | 20620925283916296038124156761241 |
[1,6,79,1837,66021,3374176,231848191,20570267229, 2285620096717,310524073877026,50598503336716611, 9732804817777566361,2180831456691952213969, 562835395375423511668692, 165687992856606963112408291, 55166524646338775672718351481, 20620925283916296038124156761241] |