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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3876 |
| 3 | 1929501 |
| 4 | 183181376 |
| 5 | 6419043125 |
| 6 | 118091211876 |
| 7 | 1388168405001 |
| 8 | 11745311589376 |
| 9 | 77279801651001 |
| 10 | 416916712502500 |
| 11 | 1915356782994501 |
| 12 | 7705740009485376 |
| 13 | 27731516944463501 |
| 14 | 90762229896563876 |
| 15 | 273716119247180625 |
| 16 | 768684707117285376 |
| 17 | 2027695320242670001 |
[0,1,3876,1929501,183181376,6419043125, 118091211876,1388168405001,11745311589376, 77279801651001,416916712502500,1915356782994501, 7705740009485376,27731516944463501, 90762229896563876,273716119247180625, 768684707117285376,2027695320242670001] |