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| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 90 |
| 3 | 256 |
| 4 | 1167 |
| 5 | 6279 |
| 6 | 44148 |
| 7 | 317019 |
| 8 | 2249565 |
| 9 | 15884635 |
| 10 | 112575442 |
| 11 | 799900089 |
| 12 | 5694840185 |
| 13 | 40579592285 |
| 14 | 289239447884 |
| 15 | 2061827748721 |
| 16 | 14698143384886 |
| 17 | 104780785903633 |
| 18 | 746986736934242 |
| 19 | 5325420761444547 |
| 20 | 37966535248953654 |
[5,90,256,1167,6279,44148,317019,2249565,15884635, 112575442,799900089,5694840185,40579592285, 289239447884,2061827748721,14698143384886, 104780785903633,746986736934242,5325420761444547, 37966535248953654] |