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| n | a(n) |
|---|---|
| 1 | 6 |
| 2 | 80 |
| 3 | 171 |
| 4 | 312 |
| 5 | 568 |
| 6 | 1064 |
| 7 | 2064 |
| 8 | 4120 |
| 9 | 8384 |
| 10 | 17256 |
| 11 | 35728 |
| 12 | 74168 |
| 13 | 154080 |
| 14 | 320008 |
| 15 | 664112 |
| 16 | 1376856 |
| 17 | 2851456 |
| 18 | 5898920 |
| 19 | 12190416 |
| 20 | 25166584 |
| 21 | 51905312 |
| 22 | 106955592 |
| 23 | 220201840 |
| 24 | 452985752 |
| 25 | 931136448 |
| 26 | 1912603624 |
| 27 | 3925869584 |
| 28 | 8053064760 |
[6,80,171,312,568,1064,2064,4120,8384,17256,35728, 74168,154080,320008,664112,1376856,2851456, 5898920,12190416,25166584,51905312,106955592, 220201840,452985752,931136448,1912603624, 3925869584,8053064760] |