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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 32 |
| 4 | 137 |
| 5 | 608 |
| 6 | 2756 |
| 7 | 12649 |
| 8 | 58958 |
| 9 | 276653 |
| 10 | 1307588 |
| 11 | 6218901 |
| 12 | 29702158 |
| 13 | 142408409 |
| 14 | 685202495 |
| 15 | 3305575314 |
| 16 | 15985832063 |
| 17 | 77479270047 |
| 18 | 376201769276 |
| 19 | 1829688142631 |
| 20 | 8912380789316 |
| 21 | 43468636118680 |
| 22 | 212265716973482 |
| 23 | 1037681765249055 |
| 24 | 5077781512552319 |
| 25 | 24870126718865262 |
| 26 | 121912282473900239 |
[1,2,8,32,137,608,2756,12649,58958,276653,1307588, 6218901,29702158,142408409,685202495,3305575314, 15985832063,77479270047,376201769276, 1829688142631,8912380789316,43468636118680, 212265716973482,1037681765249055,5077781512552319, 24870126718865262,121912282473900239] |