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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 29 |
| 4 | 122 |
| 5 | 516 |
| 6 | 2275 |
| 7 | 10063 |
| 8 | 45677 |
| 9 | 208078 |
| 10 | 958584 |
| 11 | 4448577 |
| 12 | 20763179 |
| 13 | 97353502 |
| 14 | 458968421 |
| 15 | 2170568128 |
| 16 | 10300227976 |
| 17 | 49041885644 |
| 18 | 234061077183 |
| 19 | 1119717374619 |
| 20 | 5369342997846 |
| 21 | 25793422147098 |
| 22 | 124126007981648 |
| 23 | 598378689568776 |
| 24 | 2888668186797344 |
| 25 | 13964059765313748 |
| 26 | 67594335510639572 |
[1,2,8,29,122,516,2275,10063,45677,208078,958584, 4448577,20763179,97353502,458968421,2170568128, 10300227976,49041885644,234061077183, 1119717374619,5369342997846,25793422147098, 124126007981648,598378689568776,2888668186797344, 13964059765313748,67594335510639572] |