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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 45 |
| 3 | 411 |
| 4 | 4449 |
| 5 | 55803 |
| 6 | 796581 |
| 7 | 12757503 |
| 8 | 226588257 |
| 9 | 4420898595 |
| 10 | 94001021589 |
| 11 | 2163619250895 |
| 12 | 53598352999905 |
| 13 | 1421924243354787 |
| 14 | 40221778417553637 |
| 15 | 1208471542554184767 |
| 16 | 38434396264371831873 |
| 17 | 1289995362325669726659 |
| 18 | 45567027291743788320405 |
[1,6,45,411,4449,55803,796581,12757503,226588257, 4420898595,94001021589,2163619250895, 53598352999905,1421924243354787,40221778417553637, 1208471542554184767,38434396264371831873, 1289995362325669726659,45567027291743788320405] |