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| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 98 |
| 3 | 803 |
| 4 | 6547 |
| 5 | 53389 |
| 6 | 435027 |
| 7 | 3546870 |
| 8 | 28911809 |
| 9 | 235681253 |
| 10 | 1921212987 |
| 11 | 15661161199 |
| 12 | 127665372304 |
| 13 | 1040691953095 |
| 14 | 8483425185009 |
| 15 | 69154476414585 |
| 16 | 563727672983607 |
| 17 | 4595348063993330 |
| 18 | 37459973798636833 |
| 19 | 305363079492664703 |
| 20 | 2489233196683020273 |
| 21 | 20291522858244231419 |
[13,98,803,6547,53389,435027,3546870,28911809, 235681253,1921212987,15661161199,127665372304, 1040691953095,8483425185009,69154476414585, 563727672983607,4595348063993330, 37459973798636833,305363079492664703, 2489233196683020273,20291522858244231419] |