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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 15 |
| 5 | 31 |
| 6 | 62 |
| 7 | 124 |
| 8 | 248 |
| 9 | 496 |
| 10 | 992 |
| 11 | 1985 |
| 12 | 3971 |
| 13 | 7943 |
| 14 | 15887 |
| 15 | 31775 |
| 16 | 63550 |
| 17 | 127100 |
| 18 | 254200 |
| 19 | 508400 |
| 20 | 1016800 |
| 21 | 2033601 |
| 22 | 4067203 |
| 23 | 8134407 |
| 24 | 16268815 |
| 25 | 32537631 |
| 26 | 65075262 |
| 27 | 130150524 |
| 28 | 260301048 |
| 29 | 520602096 |
| 30 | 1041204192 |
| 31 | 2082408385 |
| 32 | 4164816771 |
| 33 | 8329633543 |
[0,1,3,7,15,31,62,124,248,496,992,1985,3971,7943, 15887,31775,63550,127100,254200,508400,1016800, 2033601,4067203,8134407,16268815,32537631, 65075262,130150524,260301048,520602096,1041204192, 2082408385,4164816771,8329633543] |