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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 3 |
| 4 | 6 |
| 5 | 13 |
| 6 | 24 |
| 7 | 51 |
| 8 | 102 |
| 9 | 205 |
| 10 | 408 |
| 11 | 819 |
| 12 | 1638 |
| 13 | 3277 |
| 14 | 6552 |
| 15 | 13107 |
| 16 | 26214 |
| 17 | 52429 |
| 18 | 104856 |
| 19 | 209715 |
| 20 | 419430 |
| 21 | 838861 |
| 22 | 1677720 |
| 23 | 3355443 |
| 24 | 6710886 |
| 25 | 13421773 |
| 26 | 26843544 |
| 27 | 53687091 |
| 28 | 107374182 |
| 29 | 214748365 |
| 30 | 429496728 |
| 31 | 858993459 |
| 32 | 1717986918 |
| 33 | 3435973837 |
| 34 | 6871947672 |
| 35 | 13743895347 |
[1,0,3,6,13,24,51,102,205,408,819,1638,3277,6552, 13107,26214,52429,104856,209715,419430,838861, 1677720,3355443,6710886,13421773,26843544, 53687091,107374182,214748365,429496728,858993459, 1717986918,3435973837,6871947672,13743895347] |