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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 2 |
| 9 | 4 |
| 10 | 3 |
| 11 | 9 |
| 12 | 14 |
| 13 | 13 |
| 14 | 52 |
| 15 | 124 |
| 16 | 161 |
| 17 | 181 |
| 18 | 715 |
| 19 | 2338 |
| 20 | 7073 |
| 21 | 8624 |
| 22 | 15466 |
| 23 | 52858 |
| 24 | 150365 |
| 25 | 316543 |
| 26 | 691771 |
| 27 | 1681604 |
| 28 | 5324919 |
| 29 | 15407311 |
| 30 | 37417775 |
| 31 | 69725286 |
| 32 | 155786456 |
| 33 | 579599171 |
| 34 | 2600274145 |
| 35 | 10530031625 |
| 36 | 22971756045 |
| 37 | 47057778714 |
| 38 | 112946192928 |
[1,0,1,1,0,1,1,1,2,4,3,9,14,13,52,124,161,181,715, 2338,7073,8624,15466,52858,150365,316543,691771, 1681604,5324919,15407311,37417775,69725286, 155786456,579599171,2600274145,10530031625, 22971756045,47057778714,112946192928] |