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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 8 |
| 2 | 48 |
| 3 | 256 |
| 4 | 1279 |
| 5 | 6132 |
| 6 | 28576 |
| 7 | 130432 |
| 8 | 585985 |
| 9 | 2599952 |
| 10 | 11419808 |
| 11 | 49743104 |
| 12 | 215163647 |
| 13 | 925163500 |
| 14 | 3957669648 |
| 15 | 16854677312 |
| 16 | 71498512897 |
| 17 | 302248757272 |
| 18 | 1273756836176 |
| 19 | 5353050574336 |
| 20 | 22440215412223 |
| 21 | 93856659402724 |
| 22 | 391745066819136 |
| 23 | 1631995960879872 |
[1,8,48,256,1279,6132,28576,130432,585985,2599952, 11419808,49743104,215163647,925163500,3957669648, 16854677312,71498512897,302248757272, 1273756836176,5353050574336,22440215412223, 93856659402724,391745066819136,1631995960879872] |