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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 32 |
| 4 | 137 |
| 5 | 608 |
| 6 | 2750 |
| 7 | 12637 |
| 8 | 58808 |
| 9 | 275862 |
| 10 | 1303674 |
| 11 | 6196533 |
| 12 | 29585580 |
| 13 | 141832464 |
| 14 | 682176597 |
| 15 | 3290368486 |
| 16 | 15910303667 |
| 17 | 77097021916 |
| 18 | 374301652563 |
| 19 | 1820278278049 |
| 20 | 8865480917493 |
| 21 | 43236697516109 |
| 22 | 211120315065097 |
| 23 | 1032012445805406 |
| 24 | 5049817660372877 |
| 25 | 24732285539984953 |
| 26 | 121232215049819753 |
[1,2,8,32,137,608,2750,12637,58808,275862,1303674, 6196533,29585580,141832464,682176597,3290368486, 15910303667,77097021916,374301652563, 1820278278049,8865480917493,43236697516109, 211120315065097,1032012445805406,5049817660372877, 24732285539984953,121232215049819753] |