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| n | a(n) |
|---|---|
| 1 | 2 |
| 2 | 34 |
| 3 | 12 |
| 4 | 152 |
| 5 | 108 |
| 6 | 690 |
| 7 | 744 |
| 8 | 3232 |
| 9 | 4516 |
| 10 | 15592 |
| 11 | 25724 |
| 12 | 76914 |
| 13 | 141516 |
| 14 | 385622 |
| 15 | 762648 |
| 16 | 1955944 |
| 17 | 4058152 |
| 18 | 10001440 |
| 19 | 21421592 |
| 20 | 51425362 |
| 21 | 112496648 |
| 22 | 265415854 |
| 23 | 588810972 |
| 24 | 1373336224 |
| 25 | 3075128652 |
| 26 | 7118096080 |
| 27 | 16037159652 |
| 28 | 36935382354 |
[2,34,12,152,108,690,744,3232,4516,15592,25724, 76914,141516,385622,762648,1955944,4058152, 10001440,21421592,51425362,112496648,265415854, 588810972,1373336224,3075128652,7118096080, 16037159652,36935382354] |