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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 15 |
| 5 | 29 |
| 6 | 58 |
| 7 | 114 |
| 8 | 225 |
| 9 | 442 |
| 10 | 871 |
| 11 | 1714 |
| 12 | 3375 |
| 13 | 6641 |
| 14 | 13071 |
| 15 | 25724 |
| 16 | 50625 |
| 17 | 99629 |
| 18 | 196069 |
| 19 | 385863 |
| 20 | 759375 |
| 21 | 1494442 |
| 22 | 2941046 |
| 23 | 5787949 |
| 24 | 11390625 |
| 25 | 22416632 |
| 26 | 44115700 |
| 27 | 86819243 |
| 28 | 170859375 |
[1,1,3,7,15,29,58,114,225,442,871,1714,3375,6641, 13071,25724,50625,99629,196069,385863,759375, 1494442,2941046,5787949,11390625,22416632, 44115700,86819243,170859375] |