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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 1 |
| 7 | 7 |
| 8 | 32 |
| 9 | 131 |
| 10 | 516 |
| 11 | 1988 |
| 12 | 7664 |
| 13 | 29765 |
| 14 | 117169 |
| 15 | 467266 |
| 16 | 1880517 |
| 17 | 7588675 |
| 18 | 30491836 |
| 19 | 121191234 |
| 20 | 473940269 |
| 21 | 1816579108 |
| 22 | 6806904522 |
| 23 | 24897540538 |
| 24 | 88831250408 |
| 25 | 309108741706 |
| 26 | 1049278764758 |
| 27 | 3476233500031 |
| 28 | 11246972937210 |
| 29 | 35561409388625 |
| 30 | 109967835029368 |
| 31 | 332834886787933 |
| 32 | 986732945823099 |
[0,0,0,0,0,1,7,32,131,516,1988,7664,29765,117169, 467266,1880517,7588675,30491836,121191234, 473940269,1816579108,6806904522,24897540538, 88831250408,309108741706,1049278764758, 3476233500031,11246972937210,35561409388625, 109967835029368,332834886787933,986732945823099] |