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| n | a(n) |
|---|---|
| 1 | 125 |
| 2 | 749 |
| 3 | 4901 |
| 4 | 31805 |
| 5 | 205117 |
| 6 | 1322417 |
| 7 | 8522985 |
| 8 | 54938417 |
| 9 | 354134921 |
| 10 | 2282874145 |
| 11 | 14716407353 |
| 12 | 94869591953 |
| 13 | 611581623337 |
| 14 | 3942604144385 |
| 15 | 25416311360025 |
| 16 | 163848400648049 |
| 17 | 1056262956080393 |
| 18 | 6809292269424865 |
| 19 | 43896707048892665 |
[125,749,4901,31805,205117,1322417,8522985, 54938417,354134921,2282874145,14716407353, 94869591953,611581623337,3942604144385, 25416311360025,163848400648049,1056262956080393, 6809292269424865,43896707048892665] |