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| n | a(n) |
|---|---|
| 0 | 1 |
| 1 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 0 |
| 6 | 0 |
| 7 | 0 |
| 8 | 3212592 |
| 9 | 0 |
| 10 | 0 |
| 11 | 0 |
| 12 | 12593360640 |
| 13 | 0 |
| 14 | 1518742159360 |
| 15 | 1684323434496 |
| 16 | 233496616617720 |
| 17 | 2063296207257600 |
| 18 | 54280709965103104 |
| 19 | 1024338139923087360 |
| 20 | 25271993786704661248 |
| 21 | 603379495807494389760 |
[1,0,0,0,0,0,0,0,3212592,0,0,0,12593360640,0, 1518742159360,1684323434496,233496616617720, 2063296207257600,54280709965103104, 1024338139923087360,25271993786704661248, 603379495807494389760] |