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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 5 |
| 3 | 50 |
| 4 | 500 |
| 5 | 5480 |
| 6 | 62776 |
| 7 | 749397 |
| 8 | 9203128 |
| 9 | 115607259 |
| 10 | 1478308780 |
| 11 | 19180049927 |
| 12 | 251857056364 |
| 13 | 3340843549854 |
| 14 | 44700484300317 |
| 15 | 602574657421585 |
| 16 | 8175951649914160 |
| 17 | 111572030260242089 |
| 18 | 1530312970224714489 |
| 19 | 21085148778264281864 |
| 20 | 291705220703240850760 |
| 21 | 4050527291832419432577 |
[1,5,50,500,5480,62776,749397,9203128,115607259, 1478308780,19180049927,251857056364,3340843549854, 44700484300317,602574657421585,8175951649914160, 111572030260242089,1530312970224714489, 21085148778264281864,291705220703240850760, 4050527291832419432577] |