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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 8 |
| 3 | 28 |
| 4 | 56 |
| 5 | 70 |
| 6 | 56 |
| 7 | 28 |
| 8 | 8 |
| 9 | 1 |
| 10 | 64 |
| 11 | 1792 |
| 12 | 28672 |
| 13 | 286720 |
| 14 | 1835008 |
| 15 | 7340032 |
| 16 | 16777216 |
| 17 | 16777216 |
| 18 | 469762048 |
| 19 | 5754585088 |
| 20 | 40282095616 |
| 21 | 176234168320 |
| 22 | 493455671296 |
| 23 | 863547424768 |
| 24 | 863547424768 |
| 25 | 377801998336 |
| 26 | 6044831973376 |
| 27 | 42313823813632 |
| 28 | 169255295254528 |
[1,1,8,28,56,70,56,28,8,1,64,1792,28672,286720, 1835008,7340032,16777216,16777216,469762048, 5754585088,40282095616,176234168320,493455671296, 863547424768,863547424768,377801998336, 6044831973376,42313823813632,169255295254528] |