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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 1 |
| 8 | 6 |
| 9 | 26 |
| 10 | 94 |
| 11 | 308 |
| 12 | 941 |
| 13 | 2738 |
| 14 | 7681 |
| 15 | 20968 |
| 16 | 56018 |
| 17 | 147131 |
| 18 | 381058 |
| 19 | 975598 |
| 20 | 2473409 |
| 21 | 6218751 |
| 22 | 15522486 |
| 23 | 38501024 |
| 24 | 94961417 |
| 25 | 233053346 |
| 26 | 569395697 |
| 27 | 1385522234 |
| 28 | 3359014072 |
| 29 | 8116121300 |
| 30 | 19549835022 |
| 31 | 46957109735 |
| 32 | 112490488043 |
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