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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 14 |
| 4 | 69 |
| 5 | 413 |
| 6 | 7222 |
| 7 | 90211 |
| 8 | 2577626 |
| 9 | 127385577 |
| 10 | 5092018073 |
| 11 | 655664812074 |
| 12 | 78618294607139 |
| 13 | 13276948495989478 |
| 14 | 5995083279193033837 |
| 15 | 1895278734817024984181 |
| 16 | 1542333923096758721461086 |
| 17 | 1867485777936169465836858947 |
| 18 | 2020248742951852823878208914098 |
| 19 | 7078136335206254534330825538868049 |
[1,2,3,14,69,413,7222,90211,2577626,127385577, 5092018073,655664812074,78618294607139, 13276948495989478,5995083279193033837, 1895278734817024984181,1542333923096758721461086, 1867485777936169465836858947, 2020248742951852823878208914098, 7078136335206254534330825538868049] |