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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 14 |
| 3 | 92 |
| 4 | 662 |
| 5 | 4872 |
| 6 | 36578 |
| 7 | 278161 |
| 8 | 2135902 |
| 9 | 16522967 |
| 10 | 128574734 |
| 11 | 1005321616 |
| 12 | 7891885382 |
| 13 | 62160038813 |
| 14 | 491003317483 |
| 15 | 3888045701232 |
| 16 | 30854283708670 |
| 17 | 245315312649653 |
| 18 | 1953735732991919 |
| 19 | 15583347966328833 |
| 20 | 124463844976490422 |
| 21 | 995305632560023009 |
| 22 | 7968042676400949882 |
[1,2,14,92,662,4872,36578,278161,2135902,16522967, 128574734,1005321616,7891885382,62160038813, 491003317483,3888045701232,30854283708670, 245315312649653,1953735732991919, 15583347966328833,124463844976490422, 995305632560023009,7968042676400949882] |