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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 9 |
| 3 | 58 |
| 4 | 491 |
| 5 | 5142 |
| 6 | 64159 |
| 7 | 929078 |
| 8 | 15314361 |
| 9 | 283091122 |
| 10 | 5799651689 |
| 11 | 130423248378 |
| 12 | 3193954129651 |
| 13 | 84607886351462 |
| 14 | 2410542221526399 |
| 15 | 73500777054712438 |
| 16 | 2388182999073694001 |
| 17 | 82374234401380995042 |
| 18 | 3006071549433968619529 |
| 19 | 115713455097715665452858 |
[1,2,9,58,491,5142,64159,929078,15314361, 283091122,5799651689,130423248378,3193954129651, 84607886351462,2410542221526399,73500777054712438, 2388182999073694001,82374234401380995042, 3006071549433968619529,115713455097715665452858] |