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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 1 |
| 5 | 6 |
| 6 | 0 |
| 7 | 1 |
| 8 | 56 |
| 9 | 168 |
| 10 | 0 |
| 11 | 1 |
| 12 | 800 |
| 13 | 10080 |
| 14 | 20160 |
| 15 | 0 |
| 16 | 1 |
| 17 | 20832 |
| 18 | 1011840 |
| 19 | 6666240 |
| 20 | 9999360 |
| 21 | 0 |
| 22 | 1 |
| 23 | 1051584 |
| 24 | 216319488 |
| 25 | 3839754240 |
| 26 | 16798924800 |
| 27 | 20158709760 |
| 28 | 0 |
| 29 | 1 |
| 30 | 102233984 |
| 31 | 106867464192 |
| 32 | 5017364201472 |
| 33 | 50390374809600 |
| 34 | 163849992929280 |
| 35 | 163849992929280 |
[1,0,1,0,1,6,0,1,56,168,0,1,800,10080,20160,0,1, 20832,1011840,6666240,9999360,0,1,1051584, 216319488,3839754240,16798924800,20158709760,0,1, 102233984,106867464192,5017364201472, 50390374809600,163849992929280,163849992929280] |