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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 106 |
| 5 | 2130 |
| 6 | 79442 |
| 7 | 5581914 |
| 8 | 754371386 |
| 9 | 199193444258 |
| 10 | 103781218984098 |
| 11 | 107308976428238250 |
| 12 | 220948088846408617994 |
| 13 | 907652841888542054277618 |
| 14 | 7447285848965361047618906866 |
| 15 | 122120561639979483596993367427066 |
| 16 | 4003478037366868501269046319075211994 |
| 17 | 262435985468992467742766325045697308601154 |
| 18 | 34402470626949826173994511431148770576433889602 |
[1,2,10,106,2130,79442,5581914,754371386, 199193444258,103781218984098,107308976428238250, 220948088846408617994,907652841888542054277618, 7447285848965361047618906866, 122120561639979483596993367427066, 4003478037366868501269046319075211994, 262435985468992467742766325045697308601154, 34402470626949826173994511431148770576433889602] |