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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 1 |
| 6 | 3 |
| 7 | 10 |
| 8 | 31 |
| 9 | 121 |
| 10 | 464 |
| 11 | 1944 |
| 12 | 8454 |
| 13 | 38468 |
| 14 | 182126 |
| 15 | 893488 |
| 16 | 4535670 |
| 17 | 23760888 |
| 18 | 128267430 |
| 19 | 712403572 |
| 20 | 4065752904 |
| 21 | 23816376636 |
| 22 | 143051516760 |
| 23 | 880239634009 |
| 24 | 5544258942957 |
| 25 | 35718401802001 |
| 26 | 235202635677715 |
| 27 | 1582012735794119 |
| 28 | 10862478047272181 |
| 29 | 76093536057355965 |
| 30 | 543536686935606339 |
| 31 | 3956823673660817241 |
| 32 | 29341805120002375853 |
| 33 | 221536339165494454489 |
| 34 | 1702261439852726415968 |
| 35 | 13305909830342110613840 |
| 36 | 105760138628395361333444 |
[1,0,1,0,1,1,3,10,31,121,464,1944,8454,38468, 182126,893488,4535670,23760888,128267430, 712403572,4065752904,23816376636,143051516760, 880239634009,5544258942957,35718401802001, 235202635677715,1582012735794119, 10862478047272181,76093536057355965, 543536686935606339,3956823673660817241, 29341805120002375853,221536339165494454489, 1702261439852726415968,13305909830342110613840, 105760138628395361333444] |