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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 2 |
| 2 | 1 |
| 3 | 16 |
| 4 | 12 |
| 5 | 1 |
| 6 | 440 |
| 7 | 416 |
| 8 | 62 |
| 9 | 1 |
| 10 | 43600 |
| 11 | 48320 |
| 12 | 10016 |
| 13 | 312 |
| 14 | 1 |
| 15 | 16698560 |
| 16 | 20765520 |
| 17 | 5394320 |
| 18 | 246016 |
| 19 | 1562 |
| 20 | 1 |
| 21 | 26098464448 |
| 22 | 35382716032 |
| 23 | 10854556720 |
| 24 | 646408320 |
| 25 | 6116016 |
| 26 | 7812 |
| 27 | 1 |
| 28 | 172513149018752 |
| 29 | 250136469031744 |
| 30 | 87213434633152 |
[1,2,1,16,12,1,440,416,62,1,43600,48320,10016,312, 1,16698560,20765520,5394320,246016,1562,1, 26098464448,35382716032,10854556720,646408320, 6116016,7812,1,172513149018752,250136469031744, 87213434633152] |