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| n | a(n) |
|---|---|
| 3 | 6 |
| 4 | 26 |
| 5 | 80 |
| 6 | 226 |
| 7 | 600 |
| 8 | 1528 |
| 9 | 3776 |
| 10 | 9120 |
| 11 | 21632 |
| 12 | 50560 |
| 13 | 116736 |
| 14 | 266752 |
| 15 | 604160 |
| 16 | 1357824 |
| 17 | 3031040 |
| 18 | 6725632 |
| 19 | 14843904 |
| 20 | 32604160 |
| 21 | 71303168 |
| 22 | 155320320 |
| 23 | 337117184 |
| 24 | 729284608 |
| 25 | 1572864000 |
| 26 | 3382706176 |
| 27 | 7256145920 |
| 28 | 15527313408 |
| 29 | 33151778816 |
| 30 | 70632079360 |
| 31 | 150189637632 |
| 32 | 318767104000 |
| 33 | 675383607296 |
[6,26,80,226,600,1528,3776,9120,21632,50560, 116736,266752,604160,1357824,3031040,6725632, 14843904,32604160,71303168,155320320,337117184, 729284608,1572864000,3382706176,7256145920, 15527313408,33151778816,70632079360,150189637632, 318767104000,675383607296] |