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| n | a(n) |
|---|---|
| 1 | 1 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 6 |
| 9 | 12 |
| 10 | 24 |
| 11 | 47 |
| 12 | 92 |
| 13 | 181 |
| 14 | 356 |
| 15 | 700 |
| 16 | 1376 |
| 17 | 2705 |
| 18 | 5318 |
| 19 | 10455 |
| 20 | 20554 |
| 21 | 40408 |
| 22 | 79440 |
| 23 | 156175 |
| 24 | 307032 |
| 25 | 603609 |
| 26 | 1186664 |
| 27 | 2332920 |
| 28 | 4586400 |
| 29 | 9016625 |
| 30 | 17726218 |
| 31 | 34848827 |
| 32 | 68510990 |
| 33 | 134689060 |
| 34 | 264791720 |
| 35 | 520566815 |
| 36 | 1023407412 |
[1,0,0,0,1,2,3,6,12,24,47,92,181,356,700,1376, 2705,5318,10455,20554,40408,79440,156175,307032, 603609,1186664,2332920,4586400,9016625,17726218, 34848827,68510990,134689060,264791720,520566815, 1023407412] |