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| n | a(n) |
|---|---|
| 1 | 0 |
| 2 | 0 |
| 3 | 1 |
| 4 | 1 |
| 5 | 3 |
| 6 | 2 |
| 7 | 9 |
| 8 | 9 |
| 9 | 23 |
| 10 | 29 |
| 11 | 89 |
| 12 | 72 |
| 13 | 315 |
| 14 | 375 |
| 15 | 899 |
| 16 | 1031 |
| 17 | 3855 |
| 18 | 3886 |
| 19 | 13797 |
| 20 | 12000 |
| 21 | 42328 |
| 22 | 59989 |
| 23 | 178529 |
| 24 | 138256 |
| 25 | 647969 |
| 26 | 859841 |
| 27 | 2101143 |
| 28 | 2370917 |
| 29 | 9204061 |
| 30 | 8911060 |
| 31 | 34636833 |
| 32 | 33556537 |
| 33 | 105508927 |
| 34 | 168423669 |
| 35 | 464635937 |
[0,0,1,1,3,2,9,9,23,29,89,72,315,375,899,1031, 3855,3886,13797,12000,42328,59989,178529,138256, 647969,859841,2101143,2370917,9204061,8911060, 34636833,33556537,105508927,168423669,464635937] |