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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 8 |
| 3 | 32 |
| 4 | 114 |
| 5 | 464 |
| 6 | 1840 |
| 7 | 7424 |
| 8 | 30624 |
| 9 | 126610 |
| 10 | 529832 |
| 11 | 2233584 |
| 12 | 9471888 |
| 13 | 40427152 |
| 14 | 173398644 |
| 15 | 747197976 |
| 16 | 3233336302 |
| 17 | 14043404136 |
| 18 | 61203859260 |
| 19 | 267565075736 |
| 20 | 1173030487248 |
| 21 | 5156102021680 |
| 22 | 22718268675276 |
| 23 | 100321210527344 |
| 24 | 443919440641296 |
| 25 | 1968097221659546 |
[1,2,8,32,114,464,1840,7424,30624,126610,529832, 2233584,9471888,40427152,173398644,747197976, 3233336302,14043404136,61203859260,267565075736, 1173030487248,5156102021680,22718268675276, 100321210527344,443919440641296,1968097221659546] |