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| n | a(n) |
|---|---|
| 1 | 33 |
| 2 | 161 |
| 3 | 723 |
| 4 | 2875 |
| 5 | 10650 |
| 6 | 36674 |
| 7 | 119979 |
| 8 | 373955 |
| 9 | 1122568 |
| 10 | 3255885 |
| 11 | 9181781 |
| 12 | 25238126 |
| 13 | 67893216 |
| 14 | 179078191 |
| 15 | 464403265 |
| 16 | 1185772147 |
| 17 | 2986754467 |
| 18 | 7429480493 |
| 19 | 18276519761 |
| 20 | 44500586535 |
| 21 | 107358553904 |
| 22 | 256796921471 |
| 23 | 609508203405 |
[33,161,723,2875,10650,36674,119979,373955, 1122568,3255885,9181781,25238126,67893216, 179078191,464403265,1185772147,2986754467, 7429480493,18276519761,44500586535,107358553904, 256796921471,609508203405] |