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| n | a(n) |
|---|---|
| 1 | 20 |
| 2 | 193 |
| 3 | 4544 |
| 4 | 82312 |
| 5 | 1205110 |
| 6 | 15255786 |
| 7 | 174413126 |
| 8 | 1833703485 |
| 9 | 17851830403 |
| 10 | 162110334518 |
| 11 | 1382147742410 |
| 12 | 11129262089553 |
| 13 | 85066986799604 |
| 14 | 620037528588182 |
| 15 | 4327291721344252 |
| 16 | 29022486132474116 |
| 17 | 187651131559524364 |
[20,193,4544,82312,1205110,15255786,174413126, 1833703485,17851830403,162110334518,1382147742410, 11129262089553,85066986799604,620037528588182, 4327291721344252,29022486132474116, 187651131559524364] |