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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 2 |
| 3 | 4 |
| 4 | 8 |
| 5 | 15 |
| 6 | 30 |
| 7 | 56 |
| 8 | 108 |
| 9 | 203 |
| 10 | 384 |
| 11 | 716 |
| 12 | 1342 |
| 13 | 2487 |
| 14 | 4614 |
| 15 | 8510 |
| 16 | 15675 |
| 17 | 28749 |
| 18 | 52652 |
| 19 | 96102 |
| 20 | 175110 |
| 21 | 318240 |
| 22 | 577328 |
| 23 | 1045068 |
| 24 | 1888581 |
| 25 | 3406455 |
| 26 | 6134530 |
| 27 | 11029036 |
| 28 | 19799363 |
| 29 | 35490823 |
| 30 | 63531134 |
| 31 | 113570988 |
| 32 | 202767037 |
| 33 | 361565865 |
| 34 | 643970774 |
| 35 | 1145636750 |
[1,1,2,4,8,15,30,56,108,203,384,716,1342,2487, 4614,8510,15675,28749,52652,96102,175110,318240, 577328,1045068,1888581,3406455,6134530,11029036, 19799363,35490823,63531134,113570988,202767037, 361565865,643970774,1145636750] |