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| n | a(n) |
|---|---|
| 0 | 0 |
| 1 | 0 |
| 2 | 2 |
| 3 | 2 |
| 4 | 10 |
| 5 | 8 |
| 6 | 40 |
| 7 | 8 |
| 8 | 136 |
| 9 | 392 |
| 10 | 304 |
| 11 | 1328 |
| 12 | 3376 |
| 13 | 3152 |
| 14 | 11344 |
| 15 | 27728 |
| 16 | 25216 |
| 17 | 90752 |
| 18 | 221824 |
| 19 | 161408 |
| 20 | 685696 |
| 21 | 1734272 |
| 22 | 565504 |
| 23 | 4759808 |
| 24 | 13148416 |
| 25 | 29925632 |
| 26 | 27192064 |
| 27 | 94300928 |
| 28 | 228518656 |
| 29 | 57869312 |
| 30 | 594740224 |
| 31 | 1668482048 |
| 32 | 3815965696 |
| 33 | 2362913792 |
[0,0,2,2,10,8,40,8,136,392,304,1328,3376,3152, 11344,27728,25216,90752,221824,161408,685696, 1734272,565504,4759808,13148416,29925632,27192064, 94300928,228518656,57869312,594740224,1668482048, 3815965696,2362913792] |