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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 2 |
| 3 | 10 |
| 4 | 113 |
| 5 | 2091 |
| 6 | 53071 |
| 7 | 1699097 |
| 8 | 65414637 |
| 9 | 2935593649 |
| 10 | 150229832066 |
| 11 | 8625636578142 |
| 12 | 548722452568519 |
| 13 | 38292095950421691 |
| 14 | 2907573526178822138 |
| 15 | 238606864933942697326 |
| 16 | 21041901922349773004745 |
| 17 | 1984311337163146655202793 |
| 18 | 199256107170401946445319128 |
| 19 | 21226198257061414084824564640 |
| 20 | 2390892224585501751308482295221 |
| 21 | 283921776093206079595272233555143 |
[1,2,10,113,2091,53071,1699097,65414637, 2935593649,150229832066,8625636578142, 548722452568519,38292095950421691, 2907573526178822138,238606864933942697326, 21041901922349773004745,1984311337163146655202793, 199256107170401946445319128, 21226198257061414084824564640, 2390892224585501751308482295221, 283921776093206079595272233555143] |