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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 7 |
| 4 | 20 |
| 5 | 7 |
| 6 | 24 |
| 7 | 175 |
| 8 | 16 |
| 9 | 31 |
| 10 | 1120 |
| 11 | 255 |
| 12 | 4160 |
| 13 | 895 |
| 14 | 16768 |
| 15 | 3327 |
| 16 | 67328 |
| 17 | 15871 |
| 18 | 263680 |
| 19 | 62463 |
| 20 | 1059840 |
| 21 | 55295 |
| 22 | 4241408 |
| 23 | 217087 |
| 24 | 16912384 |
| 25 | 811007 |
| 26 | 67657728 |
| 27 | 3276799 |
| 28 | 270548992 |
| 29 | 12681215 |
| 30 | 1082228736 |
| 31 | 50397183 |
| 32 | 4328980480 |
| 33 | 201719807 |
| 34 | 17314480128 |
| 35 | 822345727 |
[1,1,6,7,20,7,24,175,16,31,1120,255,4160,895, 16768,3327,67328,15871,263680,62463,1059840,55295, 4241408,217087,16912384,811007,67657728,3276799, 270548992,12681215,1082228736,50397183,4328980480, 201719807,17314480128,822345727] |