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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 0 |
| 9 | 1 |
| 10 | 8 |
| 11 | 43 |
| 12 | 188 |
| 13 | 728 |
| 14 | 2585 |
| 15 | 8635 |
| 16 | 27543 |
| 17 | 84814 |
| 18 | 254024 |
| 19 | 744236 |
| 20 | 2141796 |
| 21 | 6074125 |
| 22 | 17017569 |
| 23 | 47191964 |
| 24 | 129735956 |
| 25 | 354005955 |
| 26 | 959729627 |
| 27 | 2587187003 |
| 28 | 6939628486 |
| 29 | 18531674702 |
| 30 | 49290612443 |
| 31 | 130633635667 |
| 32 | 345089565836 |
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