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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 0 |
| 10 | 1 |
| 11 | 6 |
| 12 | 37 |
| 13 | 158 |
| 14 | 591 |
| 15 | 1896 |
| 16 | 5537 |
| 17 | 14812 |
| 18 | 37133 |
| 19 | 87841 |
| 20 | 198267 |
| 21 | 429199 |
| 22 | 896731 |
| 23 | 1814978 |
| 24 | 3572810 |
| 25 | 6858774 |
| 26 | 12874977 |
| 27 | 23679669 |
| 28 | 42752787 |
| 29 | 75887244 |
| 30 | 132618635 |
| 31 | 228443753 |
| 32 | 388297169 |
| 33 | 651868064 |
| 34 | 1081771385 |
| 35 | 1775876764 |
| 36 | 2885944062 |
| 37 | 4645393253 |
| 38 | 7410678577 |
| 39 | 11722238660 |
| 40 | 18394159344 |
[0,0,0,0,0,0,0,0,0,1,6,37,158,591,1896,5537,14812, 37133,87841,198267,429199,896731,1814978,3572810, 6858774,12874977,23679669,42752787,75887244, 132618635,228443753,388297169,651868064, 1081771385,1775876764,2885944062,4645393253, 7410678577,11722238660,18394159344] |