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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 1 |
| 4 | 2 |
| 5 | 3 |
| 6 | 6 |
| 7 | 11 |
| 8 | 21 |
| 9 | 41 |
| 10 | 79 |
| 11 | 154 |
| 12 | 304 |
| 13 | 598 |
| 14 | 1188 |
| 15 | 2360 |
| 16 | 4719 |
| 17 | 9431 |
| 18 | 18966 |
| 19 | 38107 |
| 20 | 76968 |
| 21 | 155368 |
| 22 | 314987 |
| 23 | 638325 |
| 24 | 1298379 |
| 25 | 2640223 |
| 26 | 5385737 |
| 27 | 10984999 |
| 28 | 22465570 |
| 29 | 45945256 |
| 30 | 94180208 |
| 31 | 193076780 |
| 32 | 396603802 |
| 33 | 814838739 |
| 34 | 1676975258 |
| 35 | 3452212803 |
| 36 | 7117242628 |
[1,0,1,2,3,6,11,21,41,79,154,304,598,1188,2360, 4719,9431,18966,38107,76968,155368,314987,638325, 1298379,2640223,5385737,10984999,22465570, 45945256,94180208,193076780,396603802,814838739, 1676975258,3452212803,7117242628] |